cinematograph vs photoplay

cinematograph

noun
  • A camera that could develop its own film and served as its own projector. 

verb
  • To employ the techniques of cinematography. 

photoplay

noun
  • A theatrical play that has been filmed for showing as a movie. 

  • A novel adapted from a movie and illustrated with photographic stills taken from the film. Usage largely confined to the silent era of Hollywood. 

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