fre·quen·cy/`frikwənsɪ; ˈfriːkwənsi/ n 1 [U] the number of times that something happens, or the fact that it happens a lot 〔事情〕发生的次数; 频率: + of the frequency of bacterial infections in AIDS patients 爱滋病病人细菌感染的频率 2 [C,U] the rate at which a sound or light WAVE is repeated 〔声波、光波的〕频率: The human ear cannot hear sounds of very high frequency. 人的耳朵听不见频率很高的声音。