出现次数用英语怎么说

The term used in English for "出现次数" is "frequency".
The origin of the word "frequency" comes from the Latin word "frequens", which means "often".
Example sentences in English:
The frequency of earthquakes in this region is very low.
The radio station broadcasts at a frequency of 97.5 MHz.
We need to increase the frequency of our meetings to ensure we are on track.
Translations in Chinese:
这个地区地震的频率非常低。
这个广播电台以97.5 MHz的频率广播。
我们需要增加我们会议的频率，以确保我们在正确的轨道上。