haha vs hee-haw

haha

verb

  • To laugh. 

intj

  • An onomatopoeic representation of laughter. 

noun

  • Type of boundary to a garden, pleasure-ground, or park, designed not to interrupt the view and to be invisible until closely approached. 

  • A large leafy Hawaiian plant, Gunnera petaloidea. 

hee-haw

verb

  • To utter the cry of an ass or donkey. 

noun

  • The cry of an ass or donkey. 

  • Nothing. 

intj

  • The cry of an ass or donkey. 

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