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TOEFL IELTS BNC: 3906 COCA: 5847

incidence

Word family
in·ci·dence /ˈɪnsɪdəns/ AWL noun [countableC usually singular] formal  
AMOUNTthe number of times something happens, especially crime, disease etc 〔尤指罪行、疾病等的〕发生率 rate
incidence of
 Why did the incidence of heroin use continue to climb?
为什么吸食海洛因的人数持续攀升?
high/low etc incidence
 Smokers had the highest incidence of colds.
吸烟者中感冒的发病率最高。
Examples from the Corpus
From Longman Business Dictionary
incidencein·ci·dence /ˈɪnsɪdəns/ noun [singular]
1TAX the effect of a particular tax on people or organizations, and how much they have to pay
The structure of production may influence the incidence of taxation.
2the number of times something happens
The incidence of new product failure is very high.
in·ci·dence noun
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