ballot box vs coffin

ballot box

noun
  • A sealed box with a slit, into which a voter puts a completed voting slip. 

  • The process or method of voting. 

coffin

noun
  • A rectangular closed box in which the body of a dead person is placed for burial. 

  • A storage container for nuclear waste. 

  • The eighth Lenormand card. 

  • The hollow crust or hoof of a horse's foot, below the coronet, in which is the coffin bone. 

verb
  • To place in a coffin. 

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