compact cassette vs videotape

compact cassette

noun
  • The standard cassette tape format introduced in 1963 by Philips; an audio cassette. 

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 compact cassette and videotape occurred in a corpus of books? (source: Google Ngram Viewer )