quietus vs shinigami

quietus

noun
  • Death. 

  • Final settlement (e.g., of a debt). 

  • A stillness or pause; something that quiets or represses; removal from activity. 

shinigami

noun
  • A deity and/or personification of death. 

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