stiffness vs travel

stiffness

noun
  • rigidity or a measure of rigidity. 

  • inelegance; a lack of relaxedness. 

  • inflexibility or a measure of inflexibility. 

  • muscular tension due to unaccustomed or excessive exercise or work; soreness. 

travel

noun
  • The working motion of a piece of machinery; the length of a mechanical stroke. 

  • An account of one's travels. 

  • The activity or traffic along a route or through a given point. 

  • Distance that a keyboard's key moves vertically when depressed. 

  • The act of traveling; passage from place to place. 

  • A series of journeys. 

verb
  • To move illegally by walking or running without dribbling the ball. 

  • To travel throughout (a place). 

  • To pass from one place to another; to move or transmit 

  • To force to journey. 

  • To be on a journey, often for pleasure or business and with luggage; to go from one place to another. 

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