couch potato vs morepork

couch potato

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

morepork

noun
  • A foolish person; also, a person who is wearisome. 

  • The Tasmanian spotted owl (Ninox novaeseelandiae), a small brown owl indigenous to New Zealand and Tasmania. 

  • A person who is lazy or slow; a slowcoach, a slowpoke. 

intj
  • The call of a morepork. 

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