banknote vs riches

banknote

noun
  • A piece of paper currency. 

  • A promissory note issued by a bank, payable at a given time to a specific beneficiary. 

riches

noun
  • Money, goods, wealth, treasure. 

  • An abundance of anything desirable. 

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