autograph vs autonym

autograph

noun
  • A manuscript in the author’s handwriting. 

  • A person's signature used as a mark of formal approval. 

  • A person’s own handwriting, especially the signature of a famous or admired person. 

adj
  • Made by the artist himself or herself; authentic. 

  • Written in the author’s own handwriting. 

verb
  • To write something in one's own handwriting 

  • To sign, or write one’s name or signature on a book etc 

autonym

noun
  • A work published under the author's true name. 

  • A name used by a group or category of people to refer to themselves or their language, as opposed to a name given to them by other groups. 

  • An infraspecific name in which the specific epithet is repeated. 

  • The true name of a person or other entity, especially an author. 

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