funny vs in-joke

funny

noun
  • A joke. 

  • A rowboat with both ends pointed and out of the water. 

  • A narrow clinker-built boat for sculling. 

  • A comic strip. 

adj
  • Amusing; humorous; comical. 

  • Strange or unusual, often implying unpleasant. 

  • homosexual; gay 

  • Showing unexpected resentment. 

adv
  • In a manner seen as being typical of a homosexual, or indicating homosexuality 

  • In an unusual manner; strangely. 

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”) 

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