extravagance vs frugality

extravagance

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

  • Excessive or superfluous expenditure of money. 

frugality

noun
  • A sparing use; sparingness. 

  • The quality of being frugal; prudent economy; thrift. 

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