film vs verdigris

film

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. 

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. 

verdigris

verb
  • To cover, or coat, with verdigris. 

noun
  • A blue-green patina or rust that forms on copper-containing metals. 

  • The colour of this patina or material. 

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