housecat vs pussy-cat

housecat

noun
  • A pet cat that is not allowed outside 

pussy-cat

noun
  • A pet domestic cat; a pussy. 

  • A gentle or soft-hearted person. 

  • The silky catkin of various willows. 

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