houri vs vixen

houri

noun
  • Any voluptuous, beautiful woman. 

  • A nymph in the form of a beautiful virgin supposed to dwell in Paradise for the enjoyment of the faithful. 

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 houri and vixen occurred in a corpus of books? (source: Google Ngram Viewer )