abattoir vs butchering

abattoir

noun
  • A place or event likened to a slaughterhouse, because of great carnage or bloodshed. 

  • A public slaughterhouse for cattle, sheep, etc. 

butchering

noun
  • The act by which someone or something is butchered; a slaughter or killing. 

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