caul vs film

caul

noun
  • A membrane. 

  • The amnion which encloses the foetus before birth, especially that part of it which sometimes shrouds a baby’s head at birth (traditionally considered to be good luck). 

  • The surface of a press that makes contact with panel product, especially a removable plate or sheet. 

  • An entry to a mill lead taken from a burn or stream (a mill lead (or mill waterway) is generally smaller than a canal but moves a large volume of water). 

  • Caul fat. 

  • A strip or block of wood used to distribute or direct clamping force. 

  • A style of close-fitting circular cap worn by women in the sixteenth century and later, often made of linen. 

  • The thin membrane which covers the lower intestines; the omentum. 

film

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

  • 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. 

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 caul and film occurred in a corpus of books? (source: Google Ngram Viewer )