battle royal vs ruckus

battle royal

noun
  • A fight involving three or more individuals, teams, or factions; fought until one person, team, or faction is left standing. 

  • A heated discussion or debate. 

ruckus

noun
  • A row, fight. 

  • A noisy disturbance and/or commotion. 

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