Meaning of FREQUENCY in English

(WAVES) [noun] [U] [specialized] - the number of times that a wave, esp. a sound or radio wave, is produced within a particular period, esp. one secondthe frequency of lightlow frequency radiationThe human ear cannot hear very high-frequency sounds.(specialized) A frequency is a particular number of radio waves produced in a second at which a radio signal is broadcast.Do you know what frequency the BBC World Service is on?

Cambridge English vocab.      Кембриджский английский словарь.