plaza vs skyscraper

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. 

skyscraper

noun
  • A very tall building with a large number of floors. 

  • Anything very tall or high. 

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