foil vs frou-frou

foil

noun
  • A stylized flower or leaf. 

  • Thin aluminium/aluminum (or, formerly, tin) used for wrapping food. 

  • A thin, transparent plastic material on which marks are made and projected for the purposes of presentation. See transparency. 

  • A very thin sheet of metal. 

  • A thin layer of metal put between a jewel and its setting to make it seem more brilliant. 

  • A very thin sword with a blunted (or foiled) tip 

  • Anything that acts by contrast to emphasise the characteristics of something. 

  • In literature, theatre/theater, etc., a character who helps emphasize the traits of the main character and who usually acts as an opponent or antagonist, but can also serve as the sidekick of the protagonist. 

  • One of the incorrect answers presented in a multiple-choice test. 

  • Failure when on the point of attainment; defeat; frustration; miscarriage. 

  • The track of an animal. 

verb
  • To expand a product of two or more algebraic expressions, typically binomials. 

  • To blunt; to dull; to spoil. 

  • To prevent (someone) from accomplishing something. 

  • To prevent (something) from being accomplished. 

  • To cover or wrap with foil. 

frou-frou

noun
  • A rustling sound, particularly the rustling of a large silk dress. 

verb
  • To move with the sound of rustling dresses. 

adj
  • Liable to create the sound of rustling cloth, similar to 19th-century dresses. 

  • Unimportant, silly, useless. 

  • Highly ornamented, overly elaborate; excessively girly. 

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