ghostwrite vs indite

ghostwrite

verb
  • To author a literary work or speech in the place of another. 

  • To write under the name of another (especially literary works). 

indite

verb
  • To write, especially a literary or artistic work; to compose. 

  • To dictate; to prompt. 

  • To physically make letters and words on a writing surface; to inscribe. 

noun
  • An extremely rare indium-iron sulfide mineral. 

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