colligation vs concourse

colligation

noun
  • The co-occurrence of syntactic categories, usually within a sentence. 

  • A binding together. 

  • The formulation of a general hypothesis which seeks to connect two or more facts. 

concourse

noun
  • 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. 

  • 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 colligation and concourse occurred in a corpus of books? (source: Google Ngram Viewer )