autograph vs palimpsest

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. 

verb
  • To write something in one's own handwriting 

  • To sign, or write one’s name or signature on a book etc 

adj
  • Made by the artist himself or herself; authentic. 

  • Written in the author’s own handwriting. 

palimpsest

noun
  • A manuscript or document that has been erased or scraped clean, for reuse of the paper, parchment, vellum, or other medium on which it was written. 

  • The partial erasure of or superimposition on an older society or culture by a newer one. 

  • Something bearing the traces of an earlier, erased form. 

  • Geological features thought to be related to features or effects below the surface. 

  • Memory that has been erased and re-written. 

  • Circular features believed to be lunar craters that have been obliterated by later volcanic activity. 

verb
  • To scrape clean, as in parchment, for reuse. 

  • On paper: to reuse, often by erasure or change of pen direction or color. Especially fueled by Earth Day. 

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