couch potato vs stay at home

couch potato

noun
  • A person who spends a lot of time sitting or lying down, often watching television, eating snacks or drinking alcohol. 

stay at home

noun
  • A person who prefers to stay at home rather than socialize. 

verb
  • Used other than figuratively or idiomatically: see stay, at, home. 

  • Not to vote in an election; not to turn out; not to make it to the polls 

How often have the words couch potato and stay at home occurred in a corpus of books? (source: Google Ngram Viewer )