ankle vs fetlock

ankle

noun
  • The skeletal joint which connects the foot with the leg; the uppermost portion of the foot and lowermost portion of the leg, which contain this skeletal joint. 

verb
  • To walk. 

  • To cyclically angle the foot at the ankle while pedaling, to maximize the amount of work applied to the pedal during each revolution. 

fetlock

noun
  • A joint of the horse's leg below the knee or hock and above the hoof. 

  • The tuft of hair that grows at this joint. 

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