father-slayer vs killing

father-slayer

noun
  • One who kills or murders one's father; a patricide 

killing

noun
  • An instance of someone being killed. 

  • A large amount of money. 

adj
  • That makes one ‘die’ with laughter; very funny. 

  • That literally deprives of life; lethal, deadly, fatal. 

How often have the words father-slayer and killing occurred in a corpus of books? (source: Google Ngram Viewer )