concourse vs turnout

concourse

noun
  • 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. 

  • 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 group of people; a crowd. 

turnout

noun
  • A place where moveable rails allow a train to switch tracks; a set of points. 

  • That which is prominently brought forward or exhibited; hence, an equipage. 

  • Net quantity of produce yielded. 

  • The number or proportion of people who attend or participate in an event (especially an election) or are present at a venue. 

  • A place to pull off a road. 

  • The act of putting out to pasture. 

  • The act of coming forth. 

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