marketplace vs nerve center

marketplace

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

  • The world of commerce and trade. 

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

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

nerve center

noun
  • A physical location in a business, organization, or agency where information procured from different sources is brought together to be considered and acted upon by decision-makers. 

  • A point at which nerves come together for the processing of signals. 

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