debuff vs relapse

debuff

verb
  • To make a character or unit weaker. 

noun
  • An effect that makes a game character weaker; a negative status effect. 

relapse

verb
  • To recur; to worsen, be aggravated (after a period of improvement). 

  • To slip or slide back physically; to turn back. 

  • To fall back again; to slide or turn back into a former state or practice. 

  • To return to a vice, especially self-harm or alcoholism, failing to maintain abstinence. 

noun
  • An occasion when a person becomes ill again after a period of improvement 

  • The act or situation of relapsing. 

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