catch fire vs flame up

catch fire

verb
  • To become engulfed in flames, to combust. 

  • To become very popular or widespread; to take off. 

  • To be inspired by passion or zeal. 

flame up

verb
  • To flare; to become inflamed. 

  • To suddenly become extremely angry. 

How often have the words catch fire and flame up occurred in a corpus of books? (source: Google Ngram Viewer )