convolution vs vortex

convolution

noun
  • The shape of something rotating; a vortex. 

  • One 360° turn in a spring or similar helix. 

  • A mathematical operation on two functions that produces a third that expresses how the shape of one is modified by the other; the integral of the product of the two functions after one is reflected about the y-axis and shifted along the x-axis. 

  • Any of the folds on the surface of the brain. 

  • A twist or fold. 

  • The state or condition of being convoluted. 

  • A function which maps a tuple of sequences into a sequence of tuples. 

vortex

noun
  • A whirlwind, whirlpool, or similarly moving matter in the form of a spiral or column. 

  • Anything that involves constant violent or chaotic activity around some centre. 

  • Anything that inevitably draws surrounding things into its current. 

  • A supposed collection of particles of very subtle matter, endowed with a rapid rotary motion around an axis which was also the axis of a sun or planet; part of a Cartesian theory accounting for the formation of the universe, and the movements of the bodies composing it. 

  • Any of numerous species of small Turbellaria belonging to Vortex and allied genera. 

verb
  • To mix using a vortex mixer 

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