couch potato vs loafer

couch potato

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

loafer

noun
  • An idle person. 

  • A wolf, especially a grey or timber wolf. 

  • A shoe with no laces, resembling a moccasin. 

verb
  • To loaf around; to be idle. 

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