houri vs piece of ass

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. 

piece of ass

noun
  • A very attractive woman, when considered as a sex object. 

  • An act of intercourse, especially a one-night stand. 

  • A male prostitute. 

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