couch potato vs lounge lizard

couch potato

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

lounge lizard

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

  • An idler or pleasure-seeker; a person who spends considerable time loitering in bars and cocktail lounges. 

  • A lounge singer, especially in Las Vegas. 

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