maid vs nymph

maid

noun
  • A girl or an unmarried young woman; maiden. 

  • A female servant or cleaner (short for maidservant). 

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 maid and nymph occurred in a corpus of books? (source: Google Ngram Viewer )