junkyard vs pigsty

junkyard

noun
  • A place where rubbish is placed. 

  • A business that sells used metal or items. 

pigsty

noun
  • A dirty or very untidy place. 

  • An enclosure where pigs are kept. 

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