[ C or U ] the number of times something happens within a particular period, or the fact of something happening often or a large number or times(事件发生的)频度,次数;频繁
[ U ] specialized physics the number of times that a wave, especially a light, sound, or radio wave, is produced within a particular period, especially one second(尤指声波或无线电波每秒振动的)频率
[ C ] specialized media a particular number of radio waves produced in a second at which a radio signal is broadcast频率(无线电信号的每秒电波数)
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