extremity vs toecap

extremity

noun
  • A hand or foot. 

  • The most extreme or furthest point of something. 

  • A limb (“major appendage of a human or animal such as an arm, leg, or wing”). 

  • An extreme measure. 

toecap

noun
  • A piece of leather or other material on a shoe or boot that covers the toes. 

  • a piece of hard steel or leather on a shoe or boot for protection of the toes. 

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