unstop vs yawn

unstop

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

  • To remove a stoppage; to clear a blockage. 

  • To unplug or uncork a container. 

yawn

verb
  • To present a wide opening; gape. 

  • To say while yawning. 

  • To open the mouth widely and take a long, rather deep breath, often because one is tired or bored, and sometimes accompanied by pandiculation. 

noun
  • The action of yawning; opening the mouth widely and taking a long, rather deep breath, often because one is tired or bored. 

  • A particularly boring event. 

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