bioscope vs photoplay

bioscope

noun
  • An early form of movie projector 

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 bioscope and photoplay occurred in a corpus of books? (source: Google Ngram Viewer )