foreign currency vs fund

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. 

fund

noun
  • A sum or source of money. 

  • An organization managing such money. 

  • A large supply of something to be drawn upon. 

  • A money-management operation, such as a mutual fund. 

verb
  • To form a debt into a stock charged with interest. 

  • To place (money) in a fund. 

  • To pay or provide money for. 

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