combat vs vendetta

combat

noun
  • A battle, a fight (often one in which weapons are used). 

  • a struggle for victory 

verb
  • To fight; to struggle against. 

  • To fight (with); to struggle for victory (against). 

vendetta

noun
  • A bitter, destructive feud, normally between two families, clans, or factions, in which each injury or slaying is revenged: a blood feud. 

  • Revenge. 

  • A motivational grudge against a person or faction, which may or may not be reciprocated; the state of having it in for someone. 

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