festivity vs frolic

festivity

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

  • A festival or similar celebration. 

frolic

noun
  • Gaiety; merriment. 

  • A playful antic. 

verb
  • To make merry; to have fun; to romp; to behave playfully and uninhibitedly. 

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