swirl vs twirl

swirl

verb
  • To twist or whirl, as an eddy. 

  • To be arranged in a twist, spiral or whorl. 

  • To circulate. 

noun
  • The upward rushing of a fish through the water to take the bait. 

  • A twist or coil of something. 

  • A whirling eddy. 

twirl

verb
  • To twist round. 

  • To pitch. 

  • To rotate rapidly. 

  • To perform a twirl. 

noun
  • A little twist of some substance; a swirl. 

  • A movement where a person spins round elegantly; a pirouette. 

  • Any rotating movement; a spin. 

  • A prison guard. 

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