autography vs griffonage

autography

noun
  • Writing in one's own handwriting. 

  • A process in lithography by which a writing or drawing is transferred from paper to stone. 

  • An autobiography. 

griffonage

noun
  • Careless handwriting; a crude or illegible scrawl. 

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