caucus vs symposium

caucus

noun
  • A usually preliminary meeting of party members to nominate candidates for public office or delegates to be sent a nominating convention, or to confer regarding policy. 

  • A political interest group by members of a legislative body. 

  • A grouping of all the members of a legislature from the same party. 

verb
  • To meet and participate in a caucus. 

  • To bring into or treat in a caucus. 

symposium

noun
  • A conference or other meeting for discussion of a topic, especially one in which the participants make presentations. 

  • A drinking party in Ancient Greece, especially one with intellectual discussion. 

  • A collection of essays, articles or papers on a particular subject by a number of contributors. 

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