cat's-foot vs kangaroo paw

cat's-foot

noun
  • Synonym of ground ivy (Glechoma hederacea). 

  • Synonym of mountain cudweed (Antennaria dioica). 

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

kangaroo paw

noun
  • Any of various perennial flowering plants of the family Haemodoraceae, endemic to the south-west of Western Australia. 

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