dissection vs necropsy

dissection

noun
  • a minute and detailed examination or analysis 

  • the act of dissecting, or something dissected 

  • surgical removal 

necropsy

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

verb
  • The act of performing a necropsy. 

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