frequency

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fre|quen|cy /fr'iːkwənsi/ (frequencies)
1 [N-UNCOUNT]
The frequency of an event is the number of times it happens during a particular period.
The frequency of Kara's phone calls increased rapidly...
The tanks broke down with increasing frequency.
2 [N-VAR]
In physics, the frequency of a sound wave or a radio wave is the number of times it vibrates within a specified period of time.
You can't hear waves of such a high frequency.
...a frequency of 24 kilohertz.
...low frequency waves.

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