frequency step

例句：

1. 1. The frequency ofearthquakes in this area is relatively high.
   这个地区的地震频率相对较高。
2. 2. The frequencyof traffic accidents has decreased significantly since theimplementation of the new safety regulations.
   自从实施了新的安全规定以来，交通事故的频率已经显著下降。
3. 3. Thefrequency of people using socialmedia has increased rapidly in recentyears.
   近年来，人们使用社交媒体的频率迅速增加。