kist vs thoracic cavity

kist

noun
  • A chest. 

  • An individual installment of the yearly land revenue. 

  • A coffin. 

verb
  • To place in a coffin. 

thoracic cavity

noun
  • A chamber located within the upper human torso (and other animal bodies) which contains the heart and lungs. 

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