outbreak vs outgush

outbreak

verb
  • To burst out or break forth. 

noun
  • An eruption; the sudden appearance of a rash, disease, etc. 

  • Synonym of breakout (“escape from prison”) 

  • An outburst or sudden eruption, especially of violence and mischief. 

  • A sudden increase. 

outgush

verb
  • To gush or flow outward. 

noun
  • A pouring out; an outburst. 

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