boredom vs yawn

boredom

noun
  • The state of being bored. 

  • An instance or period of being bored; A bored state. 

yawn

noun
  • A particularly boring event. 

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

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. 

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