frequency
US /ˈfriː.kwən.si/
UK /ˈfriː.kwən.si/
1.
the rate at which something occurs or is repeated over a particular period of time or in a given sample
:
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The frequency of his visits increased over time.
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What is the frequency of the bus service?
2.
the number of waves that pass a fixed point in unit time; also, the number of cycles or vibrations undergone by a body in unit time
:
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Radio stations broadcast on different frequencies.
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The human ear can detect sounds within a certain range of frequencies.