natural disaster vs outburst

natural disaster

noun
  • The emergency situation that is the consequence of such an event. 

  • Any natural phenomenon that causes great damage and loss of life. 

outburst

noun
  • a sudden, often violent expression of emotion or activity. 

verb
  • To burst out. 

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