hallo vs roop

hallo

verb
  • To cry "hallo" (to someone). 

  • To shout, or to call with a loud voice. 

  • To chase while shouting "hallo!" 

  • To shout (something). 

noun
  • The cry "hallo!" 

  • A shout of exultation. 

roop

verb
  • To cry; shout. 

  • To roar; make a great noise. 

  • To make hoarse. 

noun
  • Hoarseness. 

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