concurrence vs contretemps

concurrence

noun
  • An instance of simultaneous occurrence. 

  • Agreement; concurring. 

contretemps

noun
  • An ill-timed pass. 

  • An unforeseen, inopportune, or embarrassing event. 

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