crupper vs hinder

crupper

noun
  • The buttocks or rump, especially of a horse. 

  • A strap, looped under a horse's tail, used to stop a saddle from slipping. 

  • A piece of armour covering the hindquarters/buttocks of a horse. 

verb
  • To fit with a crupper; to place a crupper upon. 

hinder

noun
  • The buttocks. 

adj
  • Of or belonging to that part or end which is in the rear or hind, or which follows. 

verb
  • To make difficult to accomplish; to act as an obstacle; to frustrate. 

  • To delay or impede; to keep back, to prevent. 

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