bong vs death knell

bong

noun
  • The clang of a large bell. 

  • A vessel, usually made of glass or ceramic and filled with water, used in smoking various substances; especially marijuana. 

  • A device for rapidly consuming beer, usually consisting of a funnel or reservoir of beer and a length of tubing. 

  • An Australian Aboriginal person. 

  • Doorbell chimes. 

  • A very wide piton. 

  • An act of smoking one serving of drugs from a bong. 

verb
  • To pull a bell. 

  • To ring a doorbell. 

  • To smoke a bong. 

death knell

noun
  • The tolling of a bell announcing death. 

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

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