outbreak vs succession

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. 

succession

noun
  • In Roman and Scots law, the taking of property by one person in place of another. 

  • An act of following in sequence. 

  • A group of rocks or strata that succeed one another in chronological order. 

  • A right to take possession. 

  • A race or series of descendants. 

  • A sequence of things in order. 

  • A passing of royal powers. 

  • Rotation, as of crops. 

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