kindling vs wildfire

kindling

noun
  • Small pieces of wood and twigs used to start a fire. 

  • The act by which something is kindled. 

adj
  • Illuminated, lit. 

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 kindling and wildfire occurred in a corpus of books? (source: Google Ngram Viewer )