名词
中文翻译：Unknown
同义词：
['rate', 'quantity', 'occurrence', 'recurrence']
例句：
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1.The frequency of traffic accidents has decreased significantly.
交通事故的频率已经显著下降。
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2. The frequency of earthquakes is increasing in this region.
这个地区的地震频率正在增加。
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3. The frequency of people using mobile phones has increased rapidly in recent years.
近年来，人们使用手机的频率迅速增加。