frequency

/ˈfriːkwənsi/📚 3034 64 2四级六级考研雅思
The frequency of an event is the number of times it happens during a particular period. 频率

noun [具体名词]出现次数;频繁;频率

You can't hear waves of such a high frequency.
你听不到这么高频率的声波。

frequency 出现在下面的课文中
Lesson 49 The ideal servant
Lesson 43 Are there strangers in space?
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