caw vs moan

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. 

moan

verb
  • To say in a moan, or with a moaning voice. 

  • To complain; to grumble. 

  • To grieve. 

  • To make a moan or similar sound. 

noun
  • a low, mournful cry of pain, sorrow or pleasure 

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