knacker's yard vs slaughter

knacker's yard

noun
  • The area of a slaughterhouse where carcasses unfit for human consumption or other purposes are rendered down to produce useful materials such as glue. 

  • A (notional) place to send a person or object that is spent beyond all reasonable use. 

slaughter

noun
  • The killing of animals, generally for food. 

  • A rout or decisive defeat. 

  • A mass destruction of non-living things. 

  • A massacre; the killing of a large number of people. 

  • A group of iguanas. 

verb
  • To butcher animals, generally for food. 

  • To kill someone or something, especially in a particularly brutal manner. 

  • To massacre people in large numbers. 

How often have the words knacker's yard and slaughter occurred in a corpus of books? (source: Google Ngram Viewer )