entertainment vs festivity

entertainment

noun
  • An activity designed to give pleasure, enjoyment, diversion, amusement, or relaxation to an audience, no matter whether the audience participates passively as in watching opera or a movie, or actively as in games. 

  • A show put on for the enjoyment or amusement of others. 

festivity

noun
  • An experience or expression of celebratory feeling, merriment, gaiety. 

  • A festival or similar celebration. 

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