butchery vs patricide

butchery

noun
  • The cruel, ruthless killings of humans, as at a slaughterhouse. 

  • A disastrous effort, an atrocious failure. 

  • A meat market 

  • An abattoir, a slaughterhouse. 

  • The stereotypical behaviors and accoutrements of being a butch lesbian. 

  • The butchering of meat. 

patricide

noun
  • A murderer of his/her own father. 

  • Murder of one's father. 

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