cat's-foot vs crowbar

cat's-foot

noun
  • Synonym of cat's-paw: a foot of a cat; (figurative, obsolete) a person used unwittingly or through trickery by another. 

  • Synonym of mountain cudweed (Antennaria dioica). 

  • Synonym of ground ivy (Glechoma hederacea). 

crowbar

noun
  • An iron or steel bar, often with a flattened end which may also be hook-shaped, to be used as a lever to manually force things apart. 

  • An electrical circuit that prevents an overvoltage from causing damage. 

  • A type of cocktail made with only Crown Royal whiskey and lemon lime soda. 

verb
  • To force to move, usually with a crowbar; to prise. 

How often have the words cat's-foot and crowbar occurred in a corpus of books? (source: Google Ngram Viewer )