outbreak vs recrudescence

outbreak

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. 

verb
  • To burst out or break forth. 

recrudescence

noun
  • The acute recurrence of a disease, or its symptoms, after a period of improvement. 

  • The condition or state being recrudescent; the condition of something (often undesirable) breaking out again, or re-emerging after temporary abatement or suppression. 

  • The production of a fresh shoot from a ripened spike. 

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