cist vs kist

cist

noun
  • A crypt cut into rock, chalk, or a tree trunk, especially a coffin formed by placing stone slabs on edge and topping them with a horizontal slab or slabs. 

  • A small receptacle for sacred utensils carried in festivals in Ancient Greece. 

kist

noun
  • A coffin. 

  • An individual installment of the yearly land revenue. 

  • A chest. 

verb
  • To place in a coffin. 

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