houri vs odalisque

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. 

odalisque

noun
  • A desirable or sexually attractive woman. 

  • A female slave in a harem, especially one in the Ottoman seraglio. 

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