firestorm vs wildfire

firestorm

noun
  • A fire whose intensity is greatly increased by inrushing winds. 

  • An intense or violent altercation. 

wildfire

noun
  • A rapidly spreading fire, especially one occurring in a wildland area. 

  • Something that acts or spreads quickly and uncontrollably. 

  • A spreading disease of the skin, particularly erysipelas. 

  • Greek fire, Byzantine fire. 

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