motile vs roving

motile

adj
  • Of or relating to those mental images that arise from the sensations of bodily movement and position. Cf. kinesthetic, proprioceptive. 

  • In organs: having the power to move their contents, or to change their shape or tension by writhing or contracting as required by their particular physiological functions. 

  • In organs or organelles: capable of producing motion. 

  • In organisms: having the power to move spontaneously. 

noun
  • A person whose prevailing mental imagery takes the form of inner feelings of action, such as incipient pronunciation of words, muscular innervations, etc. 

roving

adj
  • Of the eyes or gaze, inspecting all over; not staying fixed on on subject. 

  • Moving about; having no fixed or permanent abode; travelling from place to place. 

noun
  • A long and narrow bundle of fibre, usually used to spin woollen yarn or in felting. 

  • The process of giving the first twist to yarn. 

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