plaza vs quadrangle

plaza

noun
  • A town's public square. 

  • A shopping mall. 

  • A strip mall. 

  • An open area used for gathering in a city, often having small trees and sitting benches. 

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 plaza and quadrangle occurred in a corpus of books? (source: Google Ngram Viewer )