banknote vs coinage

banknote

noun
  • A piece of paper currency. 

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

coinage

noun
  • Coins taken collectively; currency. 

  • The process of creating something new. 

  • The creation of new words, neologizing. 

  • Something which has been made or invented, especially a coined word; a neologism. 

  • The process of coining money. 

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