combustion vs whirl

combustion

noun
  • Violent agitation, tumult. 

  • A process wherein a fuel is combined with oxygen, usually at high temperature, releasing heat. 

  • A process whereby two chemicals are combined to produce heat. 

  • The act or process of burning. 

whirl

noun
  • A confused tumult. 

  • (usually following “give”) A brief experiment or trial. 

  • Something that whirls. 

  • A rapid series of events. 

  • Dizziness or giddiness. 

  • An act of whirling. 

verb
  • To make something or someone whirl. 

  • To have a sensation of spinning or reeling. 

  • To remove or carry quickly with, or as with, a revolving motion; to snatch. 

  • To rotate, revolve, spin or turn rapidly. 

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