mediation vs symposium

mediation

noun
  • Negotiation to resolve differences conducted by an impartial party. 

  • The act of intervening for the purpose of bringing about a settlement. 

  • heritage interpretation 

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 mediation and symposium occurred in a corpus of books? (source: Google Ngram Viewer )