nerve center vs shopping center

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. 

shopping center

noun
  • An area, either enclosed or unenclosed, hosting multiple retail establishments; a shopping mall. 

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