knacker's yard vs monstrosity

knacker's yard

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

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

monstrosity

noun
  • A monstrous person, thing, or act. 

  • The state of being monstrous. 

  • An organism showing abnormal development or deformity. 

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