crocodile vs waiting line

crocodile

verb
  • To speak one's native language at an Esperanto-language gathering, rather than Esperanto. 

noun
  • A fallacious dilemma, mythically supposed to have been first used by a crocodile. 

  • Any of the predatory amphibious reptiles of the family Crocodylidae; (loosely) a crocodilian, any species of the order Crocodilia, which also includes the alligators, caimans and gavials. 

  • A long line or procession of people (especially children) walking together. 

waiting line

How often have the words crocodile and waiting line occurred in a corpus of books? (source: Google Ngram Viewer )