split one's sides vs tee hee

split one's sides

verb

  • To laugh hysterically. 

tee hee

verb

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

intj

  • The sound of a giggle. 

How often have the words split one's sides and tee hee occurred in a corpus of books? (source: Google Ngram Viewer )