rendezvous vs secret meeting

rendezvous

verb
  • To meet at an agreed time and place. 

noun
  • A meeting or date. 

  • A set of orbital maneuvers during which two spacecraft arrive at the same orbit and approach to a very close distance. 

  • An agreement to meet at a certain place and time. 

  • A place appointed for a meeting, or at which persons customarily meet. 

  • The appointed place for troops, or for the ships of a fleet, to assemble; also, a place for enlistment. 

secret meeting

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