necropsy vs write in

necropsy

verb
  • The act of performing a necropsy. 

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

write in

verb
  • To fill in something required, by writing. 

  • To write a letter to, e.g. a publication. 

  • To vote for a candidate not on the ballot by writing his or her name. 

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