filmy vs hairline

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 

hairline

adj
  • very thin, as thin as a hair 

noun
  • A fishing line made from hair. 

  • The line along one's forehead where hair starts growing. 

  • A very thin line in writing, drawing, or typography. 

  • A very thin fissure. 

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