copper vs frou-frou

copper

noun
  • The reddish-brown colour/color of copper. 

  • A police officer. 

  • A reddish-brown, malleable, ductile metallic element with high electrical and thermal conductivity, symbol Cu, and atomic number 29. 

  • Any of various lycaenid butterflies with copper-coloured upperwings, especially those of the genera Lycaena and Paralucia. 

adj
  • Made of copper. 

  • Having the reddish-brown colour/color of copper. 

verb
  • To sheathe or coat with copper. 

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 copper and frou-frou occurred in a corpus of books? (source: Google Ngram Viewer )