frequency group mode

例句：

1. 1.The frequency of earthquakes in this regionis relatively high.
   这个地区的地震频率相对较高。
2. 2. The frequency of people using social mediahas increased significantly over the past decade.
   过去十年里，人们使用社交媒体的频率显著增加。
3. 3. The frequency of traffic accidents has decreasedby 20% since the implementationof the new safety regulations.
   自实施新的安全规定以来，交通事故的频率下降了20%。