death knell vs tintinnabulation

death knell

noun
  • The tolling of a bell announcing death. 

  • A sign or omen foretelling the death or destruction of something. 

tintinnabulation

noun
  • The ringing of bells. 

  • A tinkling sound, as of a bell or of breaking glass. 

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