extremity vs utmost

extremity

noun
  • The most extreme or furthest point of something. 

  • A hand or foot. 

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

  • An extreme measure. 

utmost

noun
  • The greatest possible capability, extent, or quantity; maximum. 

adj
  • The most extreme; greatest, ultimate. 

  • Situated at the most distant limit; farthest, outermost. 

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