agora vs public square

agora

noun
  • A place for gathering. 

  • Since 1960, a monetary unit and coin of Israel, the 100th part of a shekel / sheqel. 

  • A marketplace, especially in Classical Greece. 

public square

noun
  • Synonym of town square 

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