audience vs concourse

audience

noun
  • A group of people within hearing; specifically, a large gathering of people listening to or watching a performance, speech, etc. 

  • The readership of a book or other written publication. 

  • A following. 

  • An audiencia (judicial court of the Spanish empire), or the territory administered by it. 

  • A widespread or nationwide viewing or listening public, as of a TV or radio network or program. 

  • A formal meeting with a state or religious dignitary. 

concourse

noun
  • A large group of people; a crowd. 

  • The running or flowing together of things; the meeting of things; confluence. 

  • An open space, especially in a park, where several roads or paths meet. 

  • Airport terminal. 

  • A large open space in or in front of a building where people can gather, particularly one joining various paths, as in a rail station or airport terminal, or providing access to and linking the platforms in a railway terminus. 

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