filmy vs unheavy

filmy

adj
  • Resembling or made of a thin film; gauzy 

  • film-like; similar to a motion picture 

  • Covered by (or as if by) a film; hazy 

unheavy

adj
  • Not heavy. 

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