arcade vs forum

arcade

noun
  • A covered passage, usually with shops on both sides. 

  • An establishment that runs coin-operated games. 

  • A row of arches. 

verb
  • To cover (something) as with a series of arches. 

forum

noun
  • A square or marketplace in a Roman town, used for public business and commerce. 

  • A gathering for the purpose of discussion. 

  • A place for discussion. 

  • An Internet message board where users can post messages regarding one or more topics of discussion. 

  • A form of discussion involving a panel of presenters and often participation by members of the audience. 

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