marketplace vs quadrangle

marketplace

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

  • 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. 

quadrangle

noun
  • The buildings forming the border of such a courtyard. 

  • A geometric shape with four angles and four straight sides; a four-sided polygon. 

  • A courtyard which is quadrangular. 

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