debuff vs mar

debuff

verb
  • To make a character or unit weaker. 

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

mar

verb
  • To spoil; to ruin; to scathe; to damage. 

noun
  • A small lake. 

  • A blemish. 

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