dipteran vs swirl

dipteran

noun
  • An insect of the large order Diptera; a fly. 

adj
  • Relating to or denoting dipterans. 

swirl

noun
  • A twist or coil of something. 

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

  • A whirling eddy. 

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

  • To circulate. 

  • To twist or whirl, as an eddy. 

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