necropsy vs necrotomy

necropsy

noun
  • The pathological examination of a corpse, particularly to determine cause of death. 

verb
  • The act of performing a necropsy. 

necrotomy

noun
  • The dissection of a cadaver. 

  • The surgical removal of dead tissue, especially bone. 

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