silver screen vs videotape

silver screen

noun
  • A cinema screen onto which movies are projected. 

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

videotape

noun
  • A relatively wide magnetic tape used for recording visual images and sounds (as of a television production) for subsequent playback or broadcasting. 

verb
  • to make a recording of something on videotape 

  • To visually record (activity, or a motion picture) in general, with or without sound. 

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