名词
中文翻译：频繁
同义词：
['frequency', 'recurrence']
例句：
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1. The frequency of earthquakesin this area is quite high.
这个地区的地震频率相当高。
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2. The frequency of occurrenceof this disease is decreasing.
这种病的发生率正在下降。
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3. The frequency of traffic accidentshas been reduced by 50%since the implementation of the new safety regulations.
自从实施新的安全规定以来，交通事故的频率已经减少了50%。