次数在英语中通常被称为"frequency"，来源于拉丁语"frequens"，意思是"frequent"，即"频繁的"。

例句：

The frequency of his visits has increased since he retired.（他退休后来访的频率增加了。）

The frequency of earthquakes in this region is quite low.（这个地区的地震频率很低。）