1.[C,U]發生率，出現率，重復率
2. 不可數名詞： 頻繁
3.[C,U]頻率,the ratio of the number of observations in a statisticAl category to the total number of observations,the number of observations in a given statistical category,the number of occurrences within a given time period,Alfven frequency 阿爾文頻率 ,chopper frequency 遮光頻率，間斷頻率，間歇頻率 ,cold frequency 冷態頻率 ,auroral frequency 極光頻率 ,average frequency 調頻中心頻率 ,blanketing frequency 抑止頻率 ,Bragg frequency 布拉格頻率 ,broadcasting frequency 廣播頻率 ,absorption frequency 吸收頻率 ,carrier frequency 載波頻率，載頻 ,frequency n. 1.[C,U]發生率，出現率，重復率2.[U]頻繁3.[C,U]頻率,low frequency a. 低周波的,dot frequency 短點頻率,gyro frequency 旋轉頻率,hyper high frequency 超高頻,reverse frequency 相反頻率,ultra high frequency 電 超高頻,frequency sampling 計 頻率取樣,radio frequency n.無線電頻率,frequency changer 變頻機,變頻器