breastbone vs kist

breastbone

noun
  • The central narrow bone in the front of the chest, connecting the collarbone and the top ribs. 

kist

noun
  • A chest. 

  • An individual installment of the yearly land revenue. 

  • A coffin. 

verb
  • To place in a coffin. 

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