donut hole vs munchkin

donut hole

noun
  • A small ball-shaped pastry, made in the same manner as a donut, roughly the size of the hole in a donut. 

  • The empty space in the center of a donut. 

  • A section of water for which no one has fishing rights that is completely surrounded by regions where various parties hold fishing rights. 

  • An income bracket where one is without benefits, even though benefits are available in the next lower and next higher brackets. 

munchkin

noun
  • Synonym of donut hole (“ball-shaped pastry”) (genericization of the Dunkin trademark "Munchkin") 

  • A person of very short stature. 

  • A player who mainly concentrates on increasing their character's power and capabilities. 

  • A child. 

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