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frequency Line breaks: fre|quency
Pronunciation: /ˈfriːkw(ə)nsi/

Definition of frequency in English:

noun (plural frequencies)

1 [mass noun] The rate at which something occurs over a particular period of time or in a given sample: an increase in the frequency of accidents due to increased overtime
More example sentences
  • Over time, symptomatic periods may increase in frequency and severity.
  • Poch and Mannering found that the presence of a sight-distance restriction was found to significantly increase accident frequency.
  • Rest periods and frequency should be the same as those for increasing muscular strength.
1.1The fact or state of being frequent or happening often.
Example sentences
  • Although such things do happen with too great frequency, cases of ‘benign neglect’ are far more common.
  • The fact that it happened with apparent frequency seems like an important detail on many levels.
  • That happens with great frequency in the system.
rate of occurrence, commonness, frequentness, prevalence, incidence, amount;
rate of repetition, recurrence, repetition, persistence, regularity;
Statistics  distribution
2The rate per second of a vibration constituting a wave, either in a material (as in sound waves), or in an electromagnetic field (as in radio waves and light): different thicknesses of glass will absorb different frequencies of sound (Symbol: f or ν)
More example sentences
  • The answer, Zuckerwar explains, is that each one generates silent infrasound - long sound waves at a frequency below 20 hertz.
  • The Doppler effect is a change in the frequency of sound waves caused by moving objects.
  • Newton concluded that these forms of light vibrate at different frequencies.
2.1The particular waveband at which radio signals are broadcast or transmitted: a radio station on a single AM radio frequency [mass noun]: a coding sequence to ensure that everyone changes frequency in the correct manner
More example sentences
  • Suppose an FM radio station is assigned the broadcast frequency 100 MHz.
  • In short, it plugs into a headphones jack and transmits the signal over an FM frequency you choose.
  • Finally, he tuned his suit's radio to the frequency listed on the cover of the transmitter.


Mid 16th century (gradually superseding late Middle English frequence; originally denoting a gathering of people): from Latin frequentia, from frequens, frequent- 'crowded, frequent'.

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