photoplay vs playhouse

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. 

playhouse

noun
  • A venue for performing plays. 

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