bankroll vs petty cash

bankroll

noun
  • The monetary assets of a person or organization. 

  • A roll of banknotes or other paper currency, carried in lieu of a wallet. 

verb
  • To fund a project; to underwrite something. 

petty cash

noun
  • Cash available for trivial purchases, especially limited funds for employees to use without close supervision. 

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