aborticide vs obliteration

aborticide

noun
  • The act of destroying a fetus in the womb; feticide. 

  • An agent responsible for an abortion (the destruction of a fetus); abortifacient. 

obliteration

noun
  • The total destruction of something. 

  • The cancellation, erasure or deletion of something. 

  • The cancellation of the function, structure, or both of a vessel or organ; for example, the occlusion of the lumen of a duct, blood vessel, or lymphatic vessel, be it solely functional (as when squeezed by nearby mass effect or inflammation) or both structural and functional (as when clogged with thrombus, embolus, or fibrosis). 

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