frippery vs seriousness

frippery

noun
  • Hence: secondhand finery; cheap and tawdry decoration; affected elegance. 

  • Useless things; trifles. 

  • Ostentation, as in fancy clothing. 

seriousness

noun
  • The state or quality of being serious. 

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