caw vs vroom

caw

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

noun
  • The harsh cry of a crow. 

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

vroom

intj
  • The sound of an engine revving up. 

verb
  • To move with great speed; to zoom. 

noun
  • The sound of an engine revving up. 

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