building site vs knacker's yard

building site

noun
  • A messy, disorganized area. 

  • The site of a former structure, indicated by an assemblage of features, artifacts or debris, remote-sensing data, or historic records (e.g., deed records). 

  • The site, the place where a building is located, is currently under construction, or shall be constructed (including structures other than buildings). 

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. 

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