coinage vs foreign currency

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. 

foreign currency

noun
  • Any currency that is in use in a foreign nation, and an authorized medium of circulation and the basis for record-keeping in that nation. 

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