全球气温上升和极端气候事件出现的频繁度不成比例。
The frequency of extreme weather events increases disproportionately as global temperatures rise.
但从面孔在广告中使用的频繁度就可以看出它的广泛性了。
But you can see how universally faces work by their prevalence in advertising.
症状的严重性、频繁度和持续时长会因患者和他们特定的疾病而 异。
The severity, frequency, and duration of symptoms vary depending on the individual and his or her particular illness.
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