celluloid vs film industry

celluloid

noun
  • The genre of cinema; film. 

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

film industry

noun
  • The technological and commercial institutions of filmmaking. 

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