cover girl vs vixen

cover girl

noun
  • An attractive, usually well-known, female model whose image has been featured on one or more magazine covers. 

vixen

noun
  • A racy or salacious woman who is sexually attractive. 

  • A female fox. 

  • A malicious, quarrelsome or temperamental woman. 

  • A wife who has sex with other men with her husband's consent. 

How often have the words cover girl and vixen occurred in a corpus of books? (source: Google Ngram Viewer )