autograph vs cacography

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 

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 autograph and cacography occurred in a corpus of books? (source: Google Ngram Viewer )