saltwater vs sweetwater

saltwater

adj
  • New Keynesian or Keynesian, in reference to macroeconomics and economics departments on the East Coast and West Coast of the United States of America. 

sweetwater

noun
  • Water that still contains sucrose after filtration by a sugar cane refinery, usually one of the main by-products of a sugar cane refining process. 

  • A variety of white grape, better known as Chasselas. 

  • neoclassical, in reference to U.S. macroeconomics and economics departments around the Great Lakes. 

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