crawfish vs draw back

crawfish

verb
  • To backpedal, desert or withdraw (also used with out). 

noun
  • Various marine crustaceans, rock lobster; especially Jasus lalandii, the Cape crawfish. 

  • Various freshwater crustaceans, crayfish. 

  • A slur against Anglo-Canadians used in some corners of Quebec (including the Gaspé). 

draw back

verb
  • to retreat from a position 

  • to pull something back or apart 

  • to withdraw from an undertaking 

  • to move backwards 

How often have the words crawfish and draw back occurred in a corpus of books? (source: Google Ngram Viewer )