celluloid vs coliseum

celluloid

noun
  • The genre of cinema; film. 

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

coliseum

noun
  • A large theatre, cinema, or stadium. 

  • A large, often circular building, for indoor sporting events, exhibitions, concerts, etc.; arena. 

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