sketchbook vs typescript

sketchbook

noun
  • A book of printed sketches. 

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

typescript

noun
  • typewritten material, especially such a copy of a manuscript 

verb
  • To transcribe into typewritten form. 

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