caw vs twirp

caw

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

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

noun
  • The harsh cry of a crow. 

twirp

intj
  • An imitation of the sound of a bird or a horn. 

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