three of a kind vs walking stick

three of a kind

noun
  • A hand including three cards of the same rank. 

walking stick

noun
  • A playing card with the rank of seven. 

  • A stick insect (order Phasmida). 

  • A tool, such as a cane, used to ease pressure on the legs, and to aid stability, when walking. 

How often have the words three of a kind and walking stick occurred in a corpus of books? (source: Google Ngram Viewer )