bludger vs couch potato

bludger

noun
  • A person who avoids working, or doing their share of work, a loafer, a hanger-on, one who does not pull their weight. 

  • The bludger (Carangoides gymnostethus), also known as the bludger trevally, nakedbreast trevally or Bleeker's jackfish, is a widespread species of large marine fish in the jack family, Carangidae. (source: Wikipedia) 

  • A pimp, a man living off the earnings of a harlot. 

  • A ball used in the sports of Quidditch and Muggle Quidditch. 

couch potato

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

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