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frequencies

B1 noun #44 most common 12 min read

frequencies

Top 44

Practice it Examples Notes & Tips frequencies in 30 Seconds

Explanation frequencies in your Level:

At the A1 level, 'frequencies' is a bit advanced, but you can think of it as 'how often' something happens. Imagine a calendar. If you go to the gym on Monday, Wednesday, and Friday, the 'frequency' of your gym visits is three times a week. If you go every day, the frequency is higher. If you only go once a month, the frequency is lower. We use the plural 'frequencies' when we talk about many different things and how often they happen. For example, 'The frequencies of bus trips are different in the morning and at night.' In the morning, buses come every 5 minutes (high frequency). At night, they come every 30 minutes (low frequency). It is a word about counting how many times something repeats in a certain time, like a minute, a day, or a year. Just remember: high frequency means it happens a lot, and low frequency means it happens only a little bit.

At the A2 level, you start to see 'frequencies' in more specific contexts, like in science class or when talking about technology. It still means 'how often', but we use it to describe patterns. For instance, if you are looking at a chart of how many students like different fruits, you are looking at the frequencies of their choices. If 10 students like apples and 2 like bananas, the frequency for apples is higher. You might also hear this word when talking about sound. Low frequencies make deep sounds like a drum. High frequencies make sharp sounds like a bird singing. When we use the plural 'frequencies', we are usually comparing these different sounds or different groups of data. It is a useful word for describing things that repeat, whether it is a habit, a sound wave, or a number in a math problem. You can use it to explain why some things happen more than others.

At the B1 level, 'frequencies' becomes a key term for discussing statistics, technology, and health. You should understand that it refers to the rate at which something occurs. In a conversation about health, a doctor might talk about the frequencies of your symptoms—do they happen every day or once a month? In technology, you'll encounter it when talking about radio, Wi-Fi, or mobile phones. These devices work by sending signals at different frequencies so they don't get mixed up. If two devices use the same frequency, they might interfere with each other. You will also use this word in more formal writing to describe data. Instead of saying 'how many times', you can say 'the frequencies of occurrence'. This makes your English sound more professional and precise. It is also common in the plural when discussing a range, such as 'the frequencies of light' or 'the frequencies of sound waves' that a human can hear.

At the B2 level, you are expected to use 'frequencies' with precision in academic and professional settings. You should be comfortable discussing 'frequency distributions' in statistics, which show how often different outcomes occur in a sample. You will also use it in physics to describe electromagnetic spectra. For example, you might explain how different frequencies of light correspond to different colors or how X-rays have much higher frequencies than radio waves. In linguistics, you might discuss 'word frequencies' and how they affect language acquisition. At this level, you should also be aware of metaphorical uses, such as 'being on the same frequency' as someone else, meaning you share the same ideas or way of thinking. You should be able to distinguish between 'frequency' (the concept) and 'frequencies' (the specific measured rates), and use them correctly in complex sentence structures involving prepositions like 'at', 'of', and 'between'.

At the C1 level, 'frequencies' is used in highly specialized and nuanced ways. You will encounter it in advanced scientific papers, where it might refer to 'resonant frequencies'—the specific rates at which objects naturally vibrate. In signal processing, you might discuss 'frequency modulation' (FM) or 'Fourier analysis', which involves breaking down complex signals into their component frequencies. You should be able to discuss the implications of frequencies in various fields, such as how 'high-frequency trading' affects the stock market or how 'low-frequency vibrations' can impact the structural integrity of buildings. Your vocabulary should include related terms like 'amplitude', 'oscillation', and 'spectrum'. You should also be able to use the word in sophisticated social commentary, perhaps discussing the 'frequencies of social unrest' in different historical periods, using the term to imply a deep, data-driven analysis of patterns and rhythms in human behavior.

At the C2 level, 'frequencies' is a tool for precise, expert communication across all disciplines. You understand the mathematical foundations of frequency as the reciprocal of the period. You can engage in deep technical discussions about 'quantum frequencies' and the 'Planck-Einstein relation', where frequency is directly proportional to energy. In the humanities, you might use 'frequencies' to describe the rhythmic structures of poetry or the recurring motifs in a composer's oeuvre, treating frequency as a fundamental element of aesthetic form. You are capable of using the word to describe the most subtle patterns in complex systems, from the 'stochastic frequencies' of random variables to the 'harmonic frequencies' that define the timbre of a musical instrument. At this level, the word is no longer just about 'how often'; it is a fundamental category of thought used to analyze the very fabric of reality, sound, light, and human interaction with absolute clarity and sophistication.

Practice it Examples Notes & Tips

frequencies in 30 Seconds

Frequencies describe how often an event repeats within a specific timeframe, serving as a fundamental measure in both everyday life and advanced scientific research.
In physics, the term specifically refers to the number of wave cycles per second, measured in Hertz, which determines properties like pitch in sound and color in light.
Statisticians use frequencies to count occurrences within a dataset, helping to identify patterns, trends, and commonalities across various groups of information.
The word is commonly used in plural to compare different rates of occurrence or to describe a range of electromagnetic or acoustic signals in technology.

The term frequencies is the plural form of frequency, a versatile noun that bridges the gap between everyday observation and complex scientific analysis. At its core, it describes how often a particular event occurs within a specific timeframe. Imagine watching waves crash against a shore; the number of waves hitting the sand every minute represents their frequency. In a broader sense, we use this word to discuss patterns in behavior, statistics, and the physical world. When we speak of frequencies in the plural, we are often comparing different rates of occurrence or discussing a spectrum of various wave cycles, such as those found in light, sound, or radio transmissions.

Statistical Context: In data science, frequencies refer to the number of times specific values appear in a dataset. For instance, a teacher might look at the frequencies of different grades in a class to see if most students are passing.

Scientists monitored the frequencies of seismic shifts to predict potential volcanic activity.

In the realm of physics and telecommunications, the word takes on a more technical meaning. It refers to the number of cycles per second of a periodic phenomenon. This is measured in Hertz (Hz). When you tune a radio, you are selecting between different electromagnetic frequencies. Each station is assigned a specific slot on the spectrum to prevent interference. Similarly, our ears perceive different frequencies of air vibration as different pitches of sound; high frequencies sound like a whistle, while low frequencies sound like a deep rumble. Understanding these variations is crucial for engineers, musicians, and doctors alike.

Medical Usage: Doctors analyze the frequencies of heartbeats or respiratory cycles to diagnose conditions. Irregular frequencies can indicate underlying health issues that require immediate attention.

The ultrasound machine uses high frequencies to create images of internal organs.

Beyond science, the word appears in sociology and linguistics. Linguists study word frequencies to determine which terms are most common in a language, helping them design better learning materials for students. In sociology, researchers might track the frequencies of social interactions among different age groups to understand loneliness or community engagement. This word is essential because it allows us to quantify the rhythm of life and the universe, turning abstract occurrences into measurable data points that we can compare and contrast.

The study compared the frequencies of bird sightings across different urban parks.

Acoustic Engineering: Sound technicians adjust various frequencies on a mixing board to ensure that the bass doesn't drown out the vocals during a live concert.

Different radio frequencies allow multiple emergency services to communicate without overlapping.

The software analyzes the frequencies of user logins to detect suspicious activity.

Using frequencies correctly requires an understanding of whether you are discussing a variety of rates or a specific set of physical cycles. In general English, it is often used in plural to describe a collection of data points regarding how often things happen. For example, 'The frequencies of accidents on this road have decreased since the new lights were installed.' Here, the speaker is referring to the recorded counts of accidents over several different periods or categories.

Scientific Precision: When writing about physics, 'frequencies' is used to describe the range of waves. 'The human ear is sensitive to frequencies between 20 Hz and 20,000 Hz.' This usage is very common in technical manuals and academic papers.

The satellite transmits data across several different frequencies to ensure a stable connection.

In comparative sentences, 'frequencies' helps highlight differences. You might say, 'The frequencies of rainfall in the desert are much lower than in the rainforest.' This compares two distinct sets of data. It is also frequently used in the context of 'high frequencies' or 'low frequencies' to describe the nature of sounds or electromagnetic waves. For instance, 'Dogs can hear much higher frequencies than humans can,' explains a biological difference in sensory perception.

Business and Marketing: Marketers look at the frequencies of customer purchases to determine loyalty. 'We need to increase the frequencies of repeat visits to our store.'

By adjusting the frequencies of the strobe lights, the artist created a sense of slow motion.

Another common structure is 'at various frequencies'. This is used when an action happens at different rates or using different channels. 'The device vibrates at various frequencies depending on the alert level.' This provides clarity on the dynamic nature of the object's behavior. In academic writing, you will often see 'relative frequencies', which refers to the proportion of a specific outcome compared to the total number of outcomes, a vital concept in probability and statistics.

The radio operator scanned the frequencies for any sign of a distress signal.

Environmental Science: Ecologists study the frequencies of certain species in an area to measure biodiversity. 'The frequencies of invasive species are rising in this ecosystem.'

Music producers use equalizers to boost or cut specific frequencies in a recording.

The light emitted by the star contains a unique set of frequencies that reveal its chemical makeup.

In the real world, you will encounter the word frequencies in several distinct environments. One of the most common is in the world of technology and media. If you've ever set up a Wi-Fi router, you might have seen options for 2.4 GHz and 5 GHz frequencies. These are the channels through which your internet data travels. Similarly, in the history of broadcasting, radio stations are often identified by their frequencies, such as '101.1 FM'. When people talk about 'tuning in', they are literally adjusting their receiver to match the frequencies of the broadcast signal.

Music and Audio: Audio engineers and audiophiles constantly talk about frequencies. They might discuss 'mid-range frequencies' when talking about the clarity of a singer's voice or 'low frequencies' when referring to the bass in a subwoofer.

The concert hall was designed to reflect sound frequencies evenly to every seat.

In the medical field, frequencies are a part of daily diagnostic language. An electrocardiogram (ECG) measures the frequencies of electrical impulses in the heart. If someone has a 'high frequency' of heart palpitations, it means they are happening often. Doctors also use 'ultrasound frequencies' to see babies in the womb or to check for internal injuries. In these cases, the word is used to describe the physical properties of the sound waves being used to create the image.

Aviation and Marine: Pilots and sailors use specific radio frequencies to talk to air traffic control or other ships. Knowing the correct frequencies is a matter of safety and coordination.

The pilot switched frequencies to contact the tower for landing instructions.

In the world of science and nature documentaries, you might hear about the 'frequencies of light' that different animals can see. For example, bees can see ultraviolet frequencies that are invisible to humans. This helps them find nectar in flowers. Similarly, bats use high-frequency sounds (echolocation) to navigate in the dark. In these contexts, 'frequencies' helps explain how different creatures interact with the physical world in ways that humans cannot naturally perceive.

Whales communicate over vast distances using very low frequencies that travel well through water.

Statistics and News: News reports often mention the frequencies of certain events, like 'the frequencies of extreme weather events are increasing due to climate change'.

The analyst noted that the frequencies of stock market fluctuations were unusually high this month.

The new 5G networks use higher frequencies to provide faster data speeds to mobile users.

One of the most frequent errors learners make is confusing the noun frequencies with the adverb 'frequently'. While they share the same root, they function differently in a sentence. 'Frequently' describes how an action is performed ('He visits frequently'), whereas 'frequencies' is a thing that can be measured or compared ('The frequencies of his visits were recorded'). Using the noun when you need an adverb can make your English sound unnatural and confusing to native speakers.

Singular vs. Plural: Another mistake is using the plural 'frequencies' when only one rate is being discussed. For example, saying 'The frequencies of the radio station is 98.5' is incorrect. It should be 'The frequency of the radio station is 98.5'. Use the plural only when referring to multiple stations or a range of values.

Incorrect: We need to check the frequencies of the clock. Correct: We need to check the frequency of the clock.

In scientific contexts, people sometimes confuse 'frequencies' with 'wavelengths'. While they are related, they are inversely proportional. A high frequency means a short wavelength, and a low frequency means a long wavelength. Mixing these up in a technical report can lead to significant errors in calculation or understanding. It's important to remember that frequency is about 'how often' a cycle repeats, while wavelength is about the physical distance between the peaks of those cycles.

Misuse with 'Amount': Do not use 'amount of frequencies'. Instead, use 'number of frequencies'. Since frequencies can be counted individually (e.g., three different radio frequencies), 'number' is the correct quantifier.

Incorrect: There is a large amount of frequencies available. Correct: There are a large number of frequencies available.

Learners also sometimes struggle with the preposition that follows 'frequencies'. While 'frequencies of' is the most common, sometimes people use 'frequencies in' incorrectly. You talk about the 'frequencies of light' or the 'frequencies of occurrence', but you might say 'interference in certain frequencies'. Understanding which preposition to use depends on whether you are describing the source of the frequency or the location where it is being observed.

The engineer noted that the frequencies of the vibrations were causing the bridge to sway.

Confusing with 'Sequences': Frequencies and sequences are different. A sequence is the order in which things happen, while frequency is how often they happen. Don't say 'the frequencies of the steps' if you mean the order of the steps.

The frequencies of the data points were plotted on a histogram to show the distribution.

Researchers are studying the frequencies of genetic mutations in isolated populations.

While frequencies is a precise term, there are several synonyms and related words that can be used depending on the context. In everyday conversation, 'rates' is the most common alternative. For example, instead of saying 'the frequencies of crime', you might say 'crime rates'. 'Rates' implies a ratio (e.g., crimes per 1,000 people), whereas 'frequencies' often just refers to the raw count of occurrences. Choosing between them depends on whether you want to emphasize the total number or the proportion relative to a population.

Frequencies vs. Rates: Use 'frequencies' for raw counts or physical wave cycles. Use 'rates' when you are comparing the count to another variable like time or population (e.g., 'interest rates', 'birth rates').

The frequencies of the pulses were consistent, but the rate of energy consumption was high.

In physics and engineering, 'cycles' or 'vibrations' are often used interchangeably with frequencies in informal discussion. However, 'frequency' specifically refers to the number of cycles per second. Another related term is 'pitch' in music. While 'frequency' is the scientific measurement, 'pitch' is the human perception of that frequency. A high-frequency sound is perceived as a high pitch. In statistics, you might use 'occurrences' or 'incidences'. 'Incidences' is particularly common in medical contexts, such as 'the incidences of the flu were high this winter'.

Frequencies vs. Occurrences: 'Occurrences' is a more general term. 'Frequencies' implies a measurement or a pattern, whereas 'occurrences' simply means things that happened.

We tracked the frequencies of errors to find the most common bugs in the code.

For more formal or academic writing, you might use 'periodicity'. This refers to the quality of happening at regular intervals. If something has high periodicity, it has very regular frequencies. In the context of radio and signals, 'channels' or 'bands' are often used. 'We are broadcasting on several different bands' is a way of saying you are using different ranges of frequencies. Understanding these alternatives allows you to vary your vocabulary and be more precise in different professional fields.

The frequencies of the oscillating pendulum were measured using a high-speed camera.

Frequencies vs. Rhythms: 'Rhythm' is often used in music or biological processes (like a 'circadian rhythm'). While it involves frequency, rhythm implies a complex pattern of beats, not just a single repeating rate.

The radio spectrum is divided into various frequencies reserved for different uses.

The frequencies of the light waves determine the colors we see in a rainbow.

How Formal Is It?

Formal

Neutral

Informal

Child friendly

Slang

Fun Fact

In the 16th century, 'frequency' was often used to describe the state of being 'frequently' in someone's company, almost like a social status. It wasn't until the 19th century that it became a primary term in physics for wave cycles.

Pronunciation Guide

UK /ˈfriː.kwən.siz/

US /ˈfriː.kwən.siz/

The primary stress is on the first syllable: FREE-quen-cies.

Rhymes With

decencies fluencies currencies constituencies deficiencies efficiencies urgencies agencies

Common Errors

Pronouncing it as 'fre-KWEN-cies' (stressing the second syllable).
Dropping the 'n' sound: 'fre-que-cies'.
Confusing the 'qu' sound with a 'k' sound: 'free-ken-cies'.
Mispronouncing the plural 'ies' as a hard 's' instead of a 'z' sound.
Saying 'frequence' instead of the full word 'frequencies'.

Difficulty Rating

Reading 3/5

Common in news and science articles, but requires context to understand the specific type of frequency.

Writing 4/5

Requires correct pluralization and understanding of prepositions like 'of' or 'at'.

Speaking 3/5

Easy to pronounce but often replaced by 'how often' in casual speech.

Listening 3/5

Clear pronunciation, but can be confused with 'frequently' if the listener is not attentive.

What to Learn Next

Prerequisites

often repeat sound wave number

Learn Next

amplitude wavelength oscillation spectrum resonance

Advanced

Fourier transform Electromagnetic spectrum Hertz Modulation Stochastic

Grammar to Know

Pluralizing nouns ending in -y

Frequency becomes frequencies (change y to i and add es).

Subject-Verb Agreement with plural nouns

The frequencies ARE high (not 'is').

Using 'number of' with countable nouns

The number of frequencies (not 'amount of').

Adjective placement before nouns

High frequencies, low frequencies, various frequencies.

Prepositional phrases with 'of'

The frequencies of the waves.

Examples by Level

The frequencies of the bus are every ten minutes.

Bussens frekvenser er hvert tiende minut.

Plural noun used to describe a repeating schedule.

We see high frequencies of rain in the winter.

Vi ser høje frekvenser af regn om vinteren.

Using 'high frequencies' to mean 'it happens often'.

The teacher counts the frequencies of correct answers.

Læreren tæller frekvenserne af rigtige svar.

Refers to the number of times something occurs.

Birds sing at different frequencies.

Fugle synger ved forskellige frekvenser.

Refers to the pitch of the sound.

Radio frequencies help us listen to music.

Radiofrekvenser hjælper os med at lytte til musik.

Common technical use of the plural.

The frequencies of my heartbeats are normal.

Frekvenserne af mine hjerteslag er normale.

Refers to the rate of a biological process.

Some sounds have very low frequencies.

Nogle lyde har meget lave frekvenser.

Describes the physical property of sound.

The frequencies of the lights changing are fast.

Frekvenserne for lysene, der skifter, er hurtige.

Describes how often an event repeats.

The chart shows the frequencies of different colors.

Diagrammet viser frekvenserne af forskellige farver.

Used in the context of simple data visualization.

Whales use low frequencies to talk to each other.

Hvaler bruger lave frekvenser til at tale med hinanden.

Scientific context regarding animal communication.

The frequencies of the vibrations made the glass break.

Vibrationernes frekvenser fik glasset til at gå i stykker.

Refers to physical oscillations.

You can change the frequencies on your walkie-talkie.

Du kan ændre frekvenserne på din walkie-talkie.

Refers to communication channels.

The frequencies of storms are increasing this year.

Frekvenserne af storme stiger i år.

Refers to the rate of natural events.

Doctors check the frequencies of a patient's breathing.

Læger tjekker frekvenserne af en patients vejrtrækning.

Medical measurement of a repeating action.

Different musical notes have different frequencies.

Forskellige musiknoter har forskellige frekvenser.

Explaining the science of music.

The frequencies of the computer's fan changed as it got hot.

Frekvenserne af computerens blæser ændrede sig, da den blev varm.

Describes the speed of a mechanical cycle.

The radio station broadcasts on several different frequencies.

Radiostationen sender på flere forskellige frekvenser.

Refers to multiple transmission channels.

We need to analyze the frequencies of these errors in the report.

Vi skal analysere frekvenserne af disse fejl i rapporten.

Statistical analysis of occurrences.

High frequencies can be damaging to human hearing over time.

Høje frekvenser kan være skadelige for menneskers hørelse over tid.

Health and safety context.

The frequencies of the light waves determine the color we see.

Lysbølgernes frekvenser bestemmer den farve, vi ser.

Physics context regarding the visible spectrum.

The frequencies of social media updates can be overwhelming.

Frekvenserne af opdateringer på sociale medier kan være overvældende.

Metaphorical/Modern life context.

The study looked at the frequencies of heart disease in different cities.

Undersøgelsen så på frekvenserne af hjertesygdomme i forskellige byer.

Epidemiological/Statistical use.

Bats use high frequencies to find insects in the dark.

Flagermus bruger høje frekvenser til at finde insekter i mørket.

Biological/Scientific use.

The frequencies of the clock's ticking were very soothing.

Frekvenserne af urets tikken var meget beroligende.

Describing a rhythmic sound.

The spectrum analyzer displays the various frequencies present in the signal.

Spektrumanalysatoren viser de forskellige frekvenser, der er til stede i signalet.

Technical engineering context.

Researchers are concerned about the increasing frequencies of extreme heatwaves.

Forskere er bekymrede over de stigende frekvenser af ekstreme hedebølger.

Environmental/Climatological context.

The frequencies of the two oscillators must be synchronized for the circuit to work.

De to oscillatorers frekvenser skal synkroniseres, for at kredsløbet kan fungere.

Electronic engineering context.

In this dialect, the frequencies of certain vowels are slightly different.

I denne dialekt er frekvenserne af visse vokaler lidt anderledes.

Phonetics/Linguistics context.

The frequencies of the seismic waves provided clues about the earth's core.

Seismiske bølgers frekvenser gav spor om jordens kerne.

Geological/Scientific context.

We observed varying frequencies of interaction between the two chemical compounds.

Vi observerede varierende frekvenser af interaktion mellem de to kemiske forbindelser.

Chemical/Experimental context.

The frequencies of the satellite's transmissions are strictly regulated by international law.

Satellittens transmissionsfrekvenser er strengt reguleret af international lov.

Legal/Technical context.

The artist used the frequencies of light to create an immersive installation.

Kunstneren brugte lysets frekvenser til at skabe en fordybende installation.

Artistic/Conceptual context.

The Fourier transform decomposes a function into its constituent frequencies.

Fourier-transformationen dekomponerer en funktion i dens bestanddele frekvenser.

Advanced mathematical/Signal processing context.

The frequencies of allele variations in the population suggest a recent evolutionary shift.

Frekvenserne af allelvariationer i populationen tyder på et nyligt evolutionært skift.

Genetics/Biological research context.

High-frequency trading algorithms exploit minute differences in market frequencies.

Algoritmer til højfrekvent handel udnytter minimale forskelle i markedsfrekvenser.

Financial/Economic context.

The resonant frequencies of the bridge were analyzed to prevent structural failure.

Broens resonansfrekvenser blev analyseret for at forhindre strukturelt svigt.

Structural engineering context.

The frequencies of the brain waves indicated that the subject had entered deep sleep.

Hjernebølgernes frekvenser indikerede, at forsøgspersonen var gået i dyb søvn.

Neuroscience/Medical context.

The frequencies of the gravitational waves were detected by the laser interferometer.

Gravitationsbølgernes frekvenser blev detekteret af laserinterferometeret.

Astrophysics/Advanced science context.

The frequencies of the phonemes in the child's speech were tracked over six months.

Frekvenserne af fonemerne i barnets tale blev sporet over seks måneder.

Developmental linguistics context.

The frequencies of the electromagnetic pulses were modulated to carry complex data.

De elektromagnetiske impulsers frekvenser blev moduleret for at bære komplekse data.

Telecommunications context.

The epistemological framework considers the frequencies of discourse as indicators of power dynamics.

Den epistemologiske ramme betragter diskursens frekvenser som indikatorer for magtdynamik.

Philosophical/Sociological context.

The subtle frequencies of the Stradivarius violin contribute to its legendary timbre.

Stradivarius-violinens subtile frekvenser bidrager til dens legendariske klangfarve.

Acoustics/Musicology context.

Quantum field theory describes particles as excitations at specific frequencies of the underlying field.

Kvantefeltteori beskriver partikler som excitationer ved specifikke frekvenser af det underliggende felt.

Theoretical physics context.

The frequencies of the spectral lines allowed the chemists to identify the unknown isotope.

Spektrallinjernes frekvenser gjorde det muligt for kemikerne at identificere den ukendte isotop.

Spectroscopy/Chemistry context.

The frequencies of the rhythmic motifs in the symphony reflect the composer's obsession with fate.

Symfoniens rytmiske motivfrekvenser afspejler komponistens besættelse af skæbnen.

Music theory/Critical analysis context.

The frequencies of the atmospheric oscillations were modeled using non-linear differential equations.

Frekvenserne af de atmosfæriske svingninger blev modelleret ved hjælp af ikke-lineære differentialligninger.

Meteorology/Mathematics context.

The frequencies of the neuronal firings in the visual cortex were mapped during the experiment.

Frekvenserne af de neuronale fyringer i den visuelle cortex blev kortlagt under eksperimentet.

Neurobiology context.

The frequencies of the linguistic shifts in the 14th century reveal the impact of the Black Death.

Frekvenserne af de sproglige skift i det 14. århundrede afslører virkningen af den sorte død.

Historical linguistics context.

Common Collocations

radio frequencies

high frequencies

low frequencies

varying frequencies

relative frequencies

resonant frequencies

word frequencies

sampling frequencies

natural frequencies

operating frequencies

Common Phrases

on the same frequency

— Thinking in the same way or understanding each other perfectly.

I'm glad we're on the same frequency regarding the project goals.

frequency distribution

— A mathematical function showing the number of instances in which a variable takes each of its possible values.

The frequency distribution of the test scores was bell-shaped.

frequency range

— The span between the lowest and highest frequencies in a signal or system.

The human voice falls within a specific frequency range.

frequency response

— The quantitative measure of the output spectrum of a system or device in response to a stimulus.

These headphones have an excellent frequency response.

radio frequency interference

— Disturbance that affects an electrical circuit due to electromagnetic conduction or radiation.

The microwave caused radio frequency interference with the Wi-Fi.

high-frequency trading

— A type of algorithmic trading characterized by high speeds and high turnover rates.

High-frequency trading accounts for a large portion of market volume.

frequency of occurrence

— How often something happens in a specific context.

The frequency of occurrence of this word is quite low.

audio frequencies

— The range of frequencies that can be heard by the human ear.

The speaker is designed to handle all audio frequencies.

carrier frequency

— The frequency of a carrier wave, used in radio transmission.

The station's carrier frequency is 1050 kHz.

frequency hopping

— A method of transmitting radio signals by rapidly switching a carrier among many frequency channels.

Bluetooth uses frequency hopping to avoid interference.

Often Confused With

frequencies vs frequently

This is an adverb meaning 'often'. Frequencies is a noun meaning 'the rates'.

frequencies vs wavelength

Wavelength is the distance between waves; frequency is how many waves pass in a second.

frequencies vs amplitude

Amplitude is the height or strength of a wave; frequency is the speed of its repetition.

Idioms & Expressions

"on a different frequency"

— To have a completely different perspective or way of thinking than someone else.

It's hard to work with him because he's always on a different frequency.

informal

"tune into the frequency"

— To become aware of or understand a particular situation or mood.

You need to tune into the frequency of the office culture.

metaphorical

"jam the frequencies"

— To prevent communication or to overwhelm a system with too much information.

The constant complaints are just jamming the frequencies of our progress.

metaphorical

"broadcast on all frequencies"

— To spread a message widely and loudly to everyone.

The company is broadcasting its new green policy on all frequencies.

metaphorical

"low-frequency vibes"

— A slang term for a negative or depressing atmosphere.

I had to leave the party; it was giving off low-frequency vibes.

slang

"high-frequency energy"

— A slang term for a positive, exciting, or intense atmosphere.

She brings such high-frequency energy to every meeting.

slang

"static on the frequency"

— A metaphor for minor misunderstandings or problems in communication.

There was some static on the frequency, but we eventually agreed.

informal

"find your frequency"

— To find the place or activity where you feel most comfortable and effective.

It took years, but he finally found his frequency in landscape photography.

metaphorical

"out of frequency"

— Not in sync or not matching the expected pattern.

His behavior was out of frequency with his usual calm self.

metaphorical

"resonate at the same frequency"

— To deeply agree with or feel a strong connection to someone or something.

Her speech resonated at the same frequency as the audience's concerns.

formal/metaphorical

Easily Confused

frequencies vs Incidence

Both refer to things happening.

Incidence usually refers to the rate of new cases (like a disease), while frequency is more general for any repeating event.

The incidence of the virus is new, but the frequency of handwashing has increased.

frequencies vs Rate

Both measure how often something happens.

Rate is often a ratio (miles per hour), while frequency is a count of cycles or occurrences.

The heart rate is 70 beats per minute; the frequencies of the electrical signals are measured in Hz.

frequencies vs Sequence

Both involve patterns of events.

Sequence is the order (1st, 2nd, 3rd), while frequency is the count (3 times).

The sequence of the lights was red-yellow-green, and the frequencies of the cycle were twice per minute.

frequencies vs Period

They are mathematically related in physics.

Period is the time it takes for one cycle; frequency is how many cycles happen in one unit of time.

The period of the wave is 0.5 seconds, so its frequency is 2 Hz.

frequencies vs Pitch

They are used interchangeably in music.

Frequency is the physical measurement; pitch is how the human ear perceives that frequency.

The frequency is 440 Hz, which we hear as the pitch of 'A'.

Sentence Patterns

The frequencies are [adjective].

The frequencies are high.

There are different frequencies of [noun].

There are different frequencies of sound.

We measured the frequencies of [noun] over [time].

We measured the frequencies of the pulses over one minute.

The [noun] operates at various frequencies to [verb].

The device operates at various frequencies to avoid interference.

By analyzing the frequencies of [noun], we can [verb].

By analyzing the frequencies of the light, we can identify the gas.

The phenomenon is characterized by a spectrum of frequencies that [verb].

The phenomenon is characterized by a spectrum of frequencies that defy simple classification.

The frequencies of [noun] have [verb] recently.

The frequencies of accidents have decreased recently.

Comparing the frequencies of [noun A] and [noun B] reveals [noun].

Comparing the frequencies of visits and purchases reveals customer loyalty.

Word Family

Nouns

Verbs

Adjectives

How to Use It

frequency

Common in technical, scientific, and statistical contexts.

Common Mistakes

The frequencies of the radio is 101.1. → The frequency of the radio is 101.1.
You are only talking about one station, so use the singular 'frequency'.
He visits us frequencies. → He visits us frequently.
You need an adverb to describe the action of visiting, not a noun.
There is a large amount of frequencies. → There are a large number of frequencies.
Frequencies are countable, so use 'number' and the plural verb 'are'.
The frequencies of the sound was too high. → The frequencies of the sound were too high.
The subject 'frequencies' is plural, so the verb must be 'were'.
I like the frequences of this music. → I like the frequencies of this music.
The spelling is 'frequencies', not 'frequences'.

Tips

Always Pluralize Correcty

Remember that the plural of frequency is 'frequencies'. Change the 'y' to 'i' and add 'es'. Never write 'frequencys'.

Sound vs. Light

In science, remember that frequencies determine the 'pitch' of sound but the 'color' of light. High frequency light is violet; low frequency light is red.

Statistical Clarity

When presenting data, use 'frequencies' to refer to the actual number of times something happened. It sounds more professional than 'counts'.

Social Connection

Use 'on the same frequency' to build rapport in a professional setting. It shows you are in sync with your colleagues.

Radio Tuning

If you are talking about radio, always use 'frequencies' in plural if you are referring to the whole spectrum or multiple stations.

The 'Qu' Sound

Don't forget the 'u' after the 'q'. It's a common mistake to write 'freqencies'. The 'qu' makes the 'kw' sound.

Relative vs. Absolute

In math, 'absolute frequencies' are the total counts, while 'relative frequencies' are the percentages. Use these terms for extra precision.

Hertz (Hz)

Whenever you see 'Hz', the text is talking about frequencies. 1 Hz means one cycle per second.

Avoid Jargon

While 'frequencies' is a great word, in very casual talk, 'how often' is usually better so you don't sound too academic.

Preposition Choice

Use 'frequencies OF' for the subject (frequencies of light) and 'frequencies IN' for the location (frequencies in the signal).

Memorize It

Mnemonic

Think of 'FREE-QUENT'. If something is FREE, people visit it FREQUENTLY. The 'frequencies' are just the count of those visits.

Visual Association

Imagine a radio dial with many numbers. Each number is a different 'frequency'. When you have many numbers, you have 'frequencies'.

Word Web

Radio Sound Light Statistics Rate Cycle Hertz Pattern

Challenge

Try to find three things in your room that have a 'frequency' (like a clock, a fan, or your own pulse) and describe their frequencies in a sentence.

Word Origin

The word comes from the Latin 'frequentia', which means 'a large gathering' or 'crowd'. This was derived from the adjective 'frequens', meaning 'crowded' or 'repeated'. It entered Middle English through the Old French word 'frequence'.

Original meaning: Originally, it referred to a crowd of people or a place being full of people. Over time, the meaning shifted from 'crowdedness' to the 'repetition' of an event.

Indo-European (Latin branch)

Cultural Context

No specific cultural sensitivities, but be careful not to use technical jargon with people who may not have a scientific background.

In the UK and US, 'frequency' is a standard part of the school curriculum in both math and science from a young age.

The movie 'Frequency' (2000), where a radio frequency allows a man to talk to his father in the past. The 'Very Large Array' in New Mexico, which listens to cosmic frequencies from space. The 'Hertz' unit of measurement, named after Heinrich Hertz, who proved the existence of electromagnetic waves.

Practice in Real Life

Real-World Contexts

Radio and Telecommunications

tuning into frequencies
signal interference
broadcast frequencies
frequency band

Statistics and Data

frequency distribution
relative frequencies
data frequencies
plotted frequencies

Music and Audio

bass frequencies
treble frequencies
audio frequency range
equalizing frequencies

Health and Medicine

heartbeat frequencies
respiratory frequencies
ultrasound frequencies
frequency of symptoms

Physics and Science

light frequencies
vibration frequencies
natural frequencies
wave frequencies

Conversation Starters

"Do you know which radio frequencies are most popular in your city?"

"How do you think the frequencies of extreme weather are changing lately?"

"Do you prefer music with lots of low frequencies or high frequencies?"

"Have you ever felt like you and a friend were on completely different frequencies?"

"What are the frequencies of your favorite hobbies during the week?"

Journal Prompts

Write about a time when you felt 'on the same frequency' as someone you just met.

Describe the frequencies of different sounds you hear in your neighborhood every morning.

Reflect on how the frequencies of your daily habits have changed over the last year.

If you could see the frequencies of light that animals see, how would the world look?

Discuss the frequencies of social media use in your life and if you want to change them.

Frequently Asked Questions

10 questions

'Frequency' is the singular concept or a single measurement (e.g., 'The frequency is 50Hz'). 'Frequencies' is the plural form used when discussing multiple different rates, a range of values, or several occurrences (e.g., 'The radio uses multiple frequencies').

In physics, frequencies are measured in Hertz (Hz), which stands for cycles per second. In statistics, you measure frequencies by simply counting how many times an event occurs within a specific group or time period.

No, humans can typically only hear frequencies between 20 Hz and 20,000 Hz. Sounds below this range are called infrasound, and sounds above this range are called ultrasound.

They are regulated to prevent interference. If two stations used the same frequencies in the same area, their signals would overlap and neither could be heard clearly. International and national laws assign specific frequencies to different users.

It is an idiom that means two people are thinking in a similar way, have the same goals, or understand each other perfectly without needing much explanation.

Yes, it is very common in science, technology, music, and math. In everyday life, people might use 'how often' more frequently, but 'frequencies' is used whenever data or technical details are involved.

High frequencies in music are the 'treble' sounds, like a flute, a violin, or the 'sss' sound in a voice. They are the fast-vibrating sound waves that give music its clarity and brightness.

Low frequencies are the 'bass' sounds, like a kick drum, a bass guitar, or a deep male voice. These waves vibrate more slowly and often provide the 'rhythm' and 'feel' of a song.

By knowing which words have the highest frequencies, learners can focus on the most useful vocabulary first. For example, 'the' has a very high frequency in English, so it is one of the first words taught.

It is a table or graph that shows how often each different value in a set of data occurs. For example, a chart showing how many people in a city are 10, 20, 30, or 40 years old is a frequency distribution.