ha-ha vs tee hee

ha-ha

intj
  • An approximation of the sound of laughter. 

noun
  • A laugh. 

  • Something funny; a joke. 

  • A ditch with one vertical side, acting as a sunken fence, designed to block the entry of animals into lawns and parks without breaking sightlines. 

verb
  • To laugh. 

tee hee

intj
  • The sound of a giggle. 

verb
  • To utter tee hee; to make a high-pitched laugh; to titter. 

How often have the words ha-ha and tee hee occurred in a corpus of books? (source: Google Ngram Viewer )