caw vs cluck

caw

noun
  • The harsh cry of a crow. 

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

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

cluck

noun
  • The sound made by a hen, especially when brooding, or calling her chicks. 

  • A kind of tongue click used to urge on a horse. 

  • Any sound similar to this. 

verb
  • To cause (the tongue) to make a clicking sound. 

  • To call together, or call to follow, as a hen does her chickens. 

  • To make such a sound. 

  • to suffer withdrawal from heroin. 

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