cinematograph vs silver screen

cinematograph

noun
  • A camera that could develop its own film and served as its own projector. 

verb
  • To employ the techniques of cinematography. 

silver screen

noun
  • A cinema screen onto which movies are projected. 

  • By extension, movies, or that which is related to movies or cinema. 

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