humorist vs laughathon

humorist

noun
  • A humorous or witty person, especially someone skilled in humorous writing or performance. 

  • One who studies or portrays the humours of people. 

laughathon

noun
  • Something very funny; a comedy session or period of great amusement. 

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