unstop vs yawp

unstop

verb
  • To draw out the stops of (an organ). 

  • To remove a stoppage; to clear a blockage. 

  • To unplug or uncork a container. 

yawp

verb
  • clamor, utter loud complaints 

  • to yelp, or utter a sharp cry, as in intense pain, or another raucous noise 

  • to talk loudly and coarsely 

noun
  • loud or coarse talk 

  • a yelp or bark 

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