concourse vs promenade deck

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. 

promenade deck

noun
  • An upper deck on a passenger ship on which passengers may walk, which can be covered but open to the air. 

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