jamboree vs reunion

jamboree

noun
  • A large rally of Scouts or Guides. 

  • A boisterous or lavish celebration or party. 

  • In euchre: an undefeatable hand containing the five highest cards. 

reunion

noun
  • A planned event at which members of a dispersed group meet together. 

  • The process or act of reuniting. 

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