acuteness vs extremity

acuteness

noun
  • Shrewdness, quickness of mind 

  • The faculty of precise discernment or perception; sensitiveness 

  • Violence of a disease, which brings it speedily to a crisis. 

  • The quality of being acute or pointed 

  • Shrillness; high pitch; – said of sounds. 

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. 

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