autonym vs surname

autonym

noun
  • 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. 

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

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

surname

noun
  • The name a person shares with other members of that person's family, distinguished from that person's given name or names; a family name. 

  • The cognomen of Roman names. 

verb
  • To call by a surname. 

  • To give a surname to. 

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