kist vs rib cage

kist

noun
  • A chest. 

  • An individual installment of the yearly land revenue. 

  • A coffin. 

verb
  • To place in a coffin. 

rib cage

noun
  • The enclosed area created by and within the ribs. 

  • A part of the skeleton within the thoracic area consisting of ribs, sternum and thoracic vertebrae. 

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