exchange of contracts vs marketplace

exchange of contracts

noun
  • The act of exchanging contracts. 

  • The point or stage at which a conveyancing contract comes into existence between negotiating parties for the carrying out of a disposition of an estate in land; usually requiring the payment of a deposit. 

marketplace

noun
  • The world of commerce and trade. 

  • A place or sphere for the exchange of anything, such as ideas or fashions. 

  • The space, actual or metaphorical, in which a market operates. 

  • An open area in a town housing a public market. 

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