bank account vs banknote

bank account

noun
  • A fund, held by a bank in a contractual arrangement between the bank and the owner of the fund, a customer of the bank, into which they can deposit and from which they can withdraw money. 

banknote

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

  • A piece of paper currency. 

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