autopsy vs witnessing

autopsy

noun
  • An eyewitness observation, the presentation of an event as witnessed. 

  • An after-the-fact examination, especially of the causes of a failure. 

  • A dissection performed on a cadaver to find possible cause(s) of death. 

verb
  • To perform an autopsy on. 

  • To perform an after-the-fact analysis of, especially of a failure. 

witnessing

noun
  • The act of bearing witness. 

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