announce vs necropsy

announce

verb
  • to pronounce; to declare by judicial sentence 

  • to give public notice, especially for the first time; to make known 

necropsy

verb
  • The act of performing a necropsy. 

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

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