motile vs permanent

motile

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

adj
  • 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. 

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

  • In organs or organelles: capable of producing motion. 

  • In organisms: having the power to move spontaneously. 

permanent

adj
  • Without end, eternal. 

  • Lasting for an indefinitely long time. 

noun
  • A card whose effects persist beyond the turn on which it is played. 

  • A chemical hair treatment imparting or removing curliness, whose effects typically last for a period of weeks; a perm. 

  • Given an n⨯n matrix a_ij,, the sum over all permutations 𝜋, of ∏ᵢ₌₁ⁿa_i𝜋(i). 

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