pigsty vs slaughterhouse

pigsty

noun
  • An enclosure where pigs are kept. 

  • A dirty or very untidy place. 

slaughterhouse

noun
  • A place where animals are slaughtered. 

  • The scene of a massacre. 

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