farm cat vs house cat

farm cat

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

house cat

noun
  • A domestic cat, Felis catus or Felis silvestris catus, commonly kept as a pet animal. 

  • A pet cat that is confined to, or almost permanently resides, inside the house. 

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