caw vs waul

caw

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

noun
  • The harsh cry of a crow. 

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

waul

verb
  • To wail, to cry plaintively. 

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