churr vs moo

churr

noun
  • A low vocal sound made by some birds. 

verb
  • To make the low vocal sound of some birds. 

moo

noun
  • The characteristic lowing sound made by cattle. 

  • A foolish woman. 

verb
  • Of a cow or bull, to make its characteristic lowing sound. 

intj
  • The characteristic sound made by a cow or bull. 

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