haunch vs trouser leg

haunch

noun
  • A squat vertical support structure. 

  • The area encompassing the upper thigh, hip and buttocks on one side of a human, primate, or quadruped animal, especially one that can sit on its hindquarters. 

  • A jerked underhand throw. 

  • The loin and leg of a quadruped, especially when used as food. 

verb
  • To provide with a haunch or supporting structure. 

  • To throw with an underhand movement. 

trouser leg

noun
  • Either of the legs of a pair of trousers 

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