in-joke vs riot

in-joke

noun
  • Synonym of inside joke (“a joke that is understood or meant to be understood only by certain people who are aware of the details”) 

riot

noun
  • A humorous or entertaining event or person. 

  • Wanton or unrestrained behavior or emotion. 

  • A tumultuous disturbance of the public peace by a large group of people, often involving violence or damage to property. 

  • A wide and unconstrained variety. 

verb
  • To cause to riot; to throw into a tumult. 

  • To annoy. 

  • To create or take part in a riot; to raise an uproar or sedition. 

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