houri vs nymph

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. 

nymph

noun
  • A young girl, especially one who is attractive, beautiful or graceful. 

  • The larva of certain insects. 

  • Any female nature spirit associated with water, forests, grotto, wind, etc. 

  • Any of various butterflies of the family Nymphalidae. 

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