annihilation vs matricide

annihilation

noun
  • The state of being annihilated. 

  • The act of destroying or otherwise turning into nothing, or nonexistence. 

  • The process of a particle and its corresponding antiparticle combining to produce energy. 

  • The act of destroying the form or combination of parts under which a thing exists, so that the name can no longer be applied to it. 

matricide

noun
  • The killing of one's mother. 

  • A person who kills his or her mother. 

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