frou-frou vs impertinent

frou-frou

adj
  • Unimportant, silly, useless. 

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

  • Highly ornamented, overly elaborate; excessively girly. 

verb
  • To move with the sound of rustling dresses. 

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

impertinent

adj
  • irrelevant, useless. 

  • insolent, ill-mannered. 

noun
  • An impertinent individual. 

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