cat's-foot vs creeping Charlie

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. 

creeping Charlie

noun
  • ground ivy, Glechoma hederacea 

  • Swedish ivy (Plectranthus verticillatus), in the mint family, a popular houseplant 

  • creeping Charlie (Pilea nummulariifolia), a houseplant in the nettle family 

  • moneywort 

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