extremity vs posture

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. 

posture

noun
  • The way a person holds and positions their body. 

  • The position of someone or something relative to another; position; situation. 

  • A situation or condition. 

  • One's attitude or the social or political position one takes towards an issue or another person. 

verb
  • To place in a particular position or attitude; to pose. 

  • to put one's body into a posture or series of postures, especially hoping that one will be noticed and admired 

  • to pretend to have an opinion or a conviction 

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