bioscope vs celluloid

bioscope

noun
  • An early form of movie projector 

celluloid

noun
  • The genre of cinema; film. 

  • Any of a variety of thermoplastics created from nitrocellulose and camphor, once used as photographic film. 

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