junkyard vs wreck yard

junkyard

noun
  • A business that sells used metal or items. 

  • A place where rubbish is placed. 

wreck yard

noun
  • The location of a dismantling business where wrecked or decommissioned vehicles are brought. Their usable parts are sold for use in operating vehicles, while the unusable metal parts, known as scrap metal, are sold to recycling companies. 

How often have the words junkyard and wreck yard occurred in a corpus of books? (source: Google Ngram Viewer )