extravagance vs unpretentiousness

extravagance

noun
  • Prodigality, as of anger, love, expression, imagination, or demands. 

  • Excessive or superfluous expenditure of money. 

unpretentiousness

noun
  • The state or condition of being unpretentious. 

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