what is the meaning of frequency
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the 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"
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the number of times something happens within a particular period, or the fact of something happening often or a large number or times: Complaints about the frequency of buses rose in the last year
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