crawfish vs shrimp

crawfish

noun
  • Various freshwater crustaceans, crayfish. 

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

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

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

shrimp

noun
  • The flesh of such crustaceans. 

  • Any of many swimming, often edible, crustaceans, chiefly of the infraorder Caridea or the suborder Dendrobranchiata, with slender legs, long whiskers and a long abdomen. 

  • A small, puny or unimportant person. 

  • Synonym of butterface: a person with an attractive body but unattractive face. 

verb
  • To fish for shrimp. 

  • To contract; to shrink. 

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