frolic vs lark

frolic

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

noun
  • Gaiety; merriment. 

  • A playful antic. 

lark

verb
  • To frolic, engage in carefree adventure. 

  • To catch larks (type of bird). 

  • To sport, engage in harmless pranking. 

noun
  • Any of various similar-appearing birds, but usually ground-living, such as the meadowlark and titlark. 

  • One who wakes early; one who is up with the larks. 

  • A romp, frolic, some fun. 

  • A prank. 

  • Any of various small, singing passerine birds of the family Alaudidae. 

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