endoynym vs selfname

endoynym

noun
  • A name used by a group for themselves or their location. 

selfname

noun
  • A proper name; a name for one's own self, as opposed to one's family; one's real name. 

  • A name given to oneself; a self-denomination; self-appellation. 

  • An autonym. 

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