frequency
n. 出现次数；频繁；频率
复数 frequencies
例句
You can't hear waves of such a high frequency.
你听不到这么高频率的声波。
《柯林斯英汉双解大词典》
The frequency of Kara's phone calls increased rapidly.
卡拉打电话的频率迅速增加。
Objects like this turn up at sales with surprising frequency.
这样的东西在拍卖会上出人意料地频繁出现。
《牛津词典》
