caw vs effusion

caw

noun
  • The harsh cry of a crow. 

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

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

effusion

noun
  • An outpouring of speech or emotion. 

  • Process of gases passing through a hole or holes considerably smaller than the mean free path of the gas molecules. 

  • The seeping of fluid into a body cavity; the fluid itself. 

  • A liquid outpouring. 

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