film vs filter

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. 

filter

noun
  • A translucent object placed in the light path of a camera to remove certain wavelengths (colors), or a computer program that simulates such an effect. 

  • self-restraint in speech. 

  • A device which separates a suspended, dissolved, or particulate matter from a fluid, solution, or other substance; any device that separates one substance from another. 

  • A non-empty upper set (of a partially ordered set) which is closed under binary infima (a.k.a. meets). 

  • Any item, mechanism, device or procedure that acts to separate or isolate. 

  • Electronics or software that separates unwanted signals (for example noise) from wanted signals or that attenuates selected frequencies. 

verb
  • To sort, sift, or isolate. 

  • To move slowly or gradually; to come or go a few at a time. 

  • To pass through a filter or to act as though passing through a filter. 

  • To diffuse; to cause to be less concentrated or focused. 

  • To ride a motorcycle between lanes on a road 

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