frequency词根

词根frequen+cy词缀，中文意思是n. 出现次数频繁频率

Regular repeating actions such as sound waves， light waves， or radio waves have a certain frequency， or number of waves per second.有规律的重复活动如声波、光波、无线电波都有一个特定的频率，或者说是每秒的波动次数。