locomotion vs motility

locomotion

noun
  • The ability to move from place to place, or the act of doing so. 

  • A dance, originally popular in the 1960s, in which the arms are used to mimic the motion of the connecting rods of a steam locomotive. 

  • Self-powered motion by which a whole organism changes its location through walking, running, jumping, crawling, swimming, brachiating or flying. 

motility

noun
  • The state of being motile (moving) 

  • The degree to which something is motile 

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