autography vs codex

autography

noun
  • An autobiography. 

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

  • Writing in one's own handwriting. 

codex

noun
  • An early manuscript book. 

  • An official list of medicines and medicinal ingredients. 

  • A book bound in the modern manner, by joining pages, as opposed to a rolled scroll. 

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