inscription vs sketchbook

inscription

noun
  • Words written in the front of a book as a dedication. 

  • Text carved on a wall or plaque, such as a memorial or gravestone. 

  • The text on a coin. 

  • The act of inscribing. 

sketchbook

noun
  • A book of printed sketches. 

  • A book or pad with blank pages for sketching; a sketch pad. 

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