athletics vs frolic

athletics

noun
  • A group of sporting activities including track and field, road running, cross country and racewalking. 

  • Physical activities such as sports and games requiring stamina, fitness and skill. 

frolic

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

noun
  • Gaiety; merriment. 

  • A playful antic. 

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