caw vs ha-ha

caw

noun
  • The harsh cry of a crow. 

verb
  • To make the harsh cry of a crow, rook, or raven. 

intj
  • A rendering of the vocalisation of a crow or other corvid. 

ha-ha

noun
  • Something funny; a joke. 

  • A laugh. 

  • 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. 

intj
  • An approximation of the sound of laughter. 

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