cassette vs film

cassette

noun
  • A lightproof container for photographic film. 

  • A small flat case containing magnetic tape on two reels, used to record and play back audio and video material. 

  • A saggar (ceramic container used in a kiln) 

  • Any similar small cartridge, such as for a computer disk or cassette air conditioner 

  • A modular DNA sequence encoding one or more genes for a single biochemical function. 

  • A set of sprockets mounted onto a splined shaft on the freehub. 

film

noun
  • A medium used to capture images in a camera. 

  • A slender thread, such as that of a cobweb. 

  • A visual art form that consists of a sequence of still images preserved on a recording medium to give the illusion of motion; movies generally. 

  • A thin layer of some substance; a pellicle; a membranous covering, causing opacity. 

verb
  • To cover or become covered with a thin skin or pellicle. 

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

  • To record (activity, or a motion picture) on photographic film. 

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