frequency

noun
fre·​quen·​cy | \ ˈfrē-kwən(t)-sē How to pronounce frequency (audio) \
plural frequencies

Definition of frequency

1 : the fact or condition of occurring frequently the frequency of automobile accidents
2a : the number of times that a periodic function repeats the same sequence of values during a unit variation of the independent variable
b : the number, proportion, or percentage of items in a particular category in a set of data
3 : the number of repetitions of a periodic process in a unit of time: such as
a : the number of complete alternations (see alternation sense 1) per second of an alternating current
b : the number of complete oscillations (see oscillation sense 3) per second of energy (such as sound or electromagnetic radiation) in the form of waves

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Examples of frequency in a Sentence

the alarming frequency of serious automobile accidents caused by young drivers The frequency of student errors was frustrating to the young teacher. Our visits decreased in frequency. Errors were occurring with increasing frequency. a sound wave of high frequency waves having very different frequencies from one another a current having a frequency of 60 hertz a radio frequency of 30 megahertz
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Recent Examples on the Web

Hopkins said that the technical problem in Needham is unrelated to the Aug. 2 changeover, when nine local stations switched to different frequencies. BostonGlobe.com, "GE CEO buys $3m in company stock," 14 Aug. 2019 In one experiment carried out in the 1990s, a dolphin named Natua was given the task of distinguishing between auditory pitches of different frequencies. Thomas Nagel, The New York Review of Books, "Known Unknowns," 18 Apr. 2019 And one of those challenges — a familiar one for OnePlus — will be building 5G phones for multiple cellular carriers that operate on different frequencies. Sean Hollister, The Verge, "5G phones could cost $200 to $300 more, says OnePlus CEO," 6 Dec. 2018 Since hydrogen and deuterium have identical shapes but different vibrational frequencies, the results again suggested that our noses could indeed detect vibrations. Tim Folger, Discover Magazine, "How Quantum Mechanics Lets Us See, Smell and Touch," 24 Oct. 2018 Tools of the Trade Sound baths use repetitive notes at different frequencies to help bring your focus away from your thoughts. Nicole Dellert, Allure, "I Tried a Sound Bath — Here's What This Meditative Practice Is Really Like," 24 Oct. 2018 Those antennas will need to operate over different frequencies than those used in today’s networks. Stu Woo, WSJ, "In the 5G Race, Airwave Auctions Are the Next Rivalry," 7 Oct. 2018 Researchers have noted activity over a range of different frequencies, from delta (0.5 to 4 hertz) through to gamma (25 to 140 Hz) waves. Simon Makin, Scientific American, "“Traveling” Brain Waves May Be Critical for Cognition," 28 June 2018 Both words are being said on different frequencies, and various folks hear it differently. CBS News, "Faith Salie on the great Laurel vs. Yanny debate," 20 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'frequency.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of frequency

1600, in the meaning defined at sense 1

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More Definitions for frequency

frequency

noun
fre·​quen·​cy | \ ˈfrē-kwən-sē How to pronounce frequency (audio) \
plural frequencies

Kids Definition of frequency

1 : frequent repetition Rain fell with frequency.
2 : rate of repetition She went with increasing frequency.
3 : the number of waves of sound or energy that pass by a point every second Tune the stereo to receive a specific frequency of radio waves.

frequency

noun
fre·​quen·​cy | \ ˈfrē-kwən-sē How to pronounce frequency (audio) \
plural frequencies

Medical Definition of frequency

1 : the number of individuals in a single class when objects are classified according to variations in a set of one or more specified attributes
2 : the number of repetitions of a periodic process in a unit of time

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