couch potato vs laggard

couch potato

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

laggard

noun
  • One who lags behind; one who takes more time than is necessary or than the others in a group. 

adj
  • Lagging behind; taking more time than the others in a group. 

  • Not growing as quickly as the rest of the flock or herd. 

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