combustion vs pandemonium

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. 

pandemonium

noun
  • A loud, wild, tumultuous protest, disorder, or chaotic situation, usually of a crowd, often violent. 

  • An outburst; loud, riotous uproar, especially of a crowd. 

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