farm cat vs kitten

farm cat

noun
  • A domestic cat, usually of a mixed breed, that lives primarily outdoors, in a feral or semiferal condition on agricultural properties. 

kitten

noun
  • A young cat, especially before sexual maturity (reached at about seven months). 

  • A moth of the genus Furcula. 

  • A young rabbit, rat, hedgehog, squirrel, fox, beaver, badger, etc. 

  • A term of endearment, especially for a woman. 

verb
  • To give birth to kittens. 

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