caw vs gnarl

caw

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

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

noun
  • The harsh cry of a crow. 

gnarl

verb
  • To snarl or growl; to gnar. 

  • To knot or twist something. 

noun
  • A knot in wood; a large or hard knot, or a protuberance with twisted grain, on a tree. 

  • Something resembling a knot in wood, such as in stone or limbs. 

adj
  • Gnarled, knotty, twisted. 

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