expensiveness vs extravagance

expensiveness

noun
  • The state of being expensive; the entailing of great expense. 

extravagance

noun
  • Excessive or superfluous expenditure of money. 

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

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