quickness vs slowness

quickness

noun
  • rapidity of movement or activity; agility or dexterity 

slowness

noun
  • A unit, the reciprocal of velocity, that delineates the amount of time required for an object to travel a given distance. 

  • The quality or state of being slow. 

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