autography vs cacography

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. 

cacography

noun
  • Poor or illegible handwriting. 

  • Bad spelling or punctuation, especially unintuitive spellings considered as a feature of a whole language or dialect. 

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