cluck vs roop

cluck

verb
  • To make such a sound. 

  • To cause (the tongue) to make a clicking sound. 

  • To call together, or call to follow, as a hen does her chickens. 

  • to suffer withdrawal from heroin. 

noun
  • The sound made by a hen, especially when brooding, or calling her chicks. 

  • A kind of tongue click used to urge on a horse. 

  • Any sound similar to this. 

roop

verb
  • To roar; make a great noise. 

  • To make hoarse. 

  • To cry; shout. 

noun
  • Hoarseness. 

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