flux vs motility

flux

noun
  • The act of flowing; a continuous moving on or passing by, as of a flowing stream. 

  • The rate of transfer of energy (or another physical quantity), especially an electric or magnetic field, through a given surface. 

  • A state of ongoing change. 

  • The state of being liquid through heat; fusion. 

  • A chemical agent for cleaning metal prior to soldering or welding. 

adj
  • Flowing; unstable; inconstant; variable. 

verb
  • To flow as a liquid. 

  • To use flux on. 

  • To melt. 

motility

noun
  • The state of being motile (moving) 

  • The degree to which something is motile 

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