gambol vs horseplay

gambol

verb
  • To move about playfully; to frolic. 

  • To do a forward roll. 

noun
  • An instance of more general frisking or frolicking. 

  • An instance of running or skipping about playfully. 

horseplay

verb
  • To engage in horseplay. 

noun
  • Rough or rowdy play that can often result in unintentional physical harm. 

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