Mafia vs abyss

Mafia

name
  • A party game modelling a conflict between an informed minority (the mafia) and an uninformed majority (the innocents). Each player is secretly assigned a role within one of these teams, and the innocents attempt to identify the mafia members before they are all "murdered". 

  • The international criminal organization of Sicilian origin operating in Italy and the United States. 

  • Any other specific organized crime syndicate operating internationally in high-level organized crime; often with a modifying adjective, such as a nationality. 

abyss

noun
  • Moral depravity; vast intellectual or moral depth. 

  • The abyssal zone. 

  • An impending catastrophic happening. 

  • A bottomless or unfathomed depth, gulf, or chasm; hence, any deep, immeasurable; any void space. 

  • Anything infinite, immeasurable, or profound. 

  • The center of an escutcheon. 

  • Hell; the bottomless pit; primeval chaos; a confined subterranean ocean. 

  • A difference, especially a large difference, between groups. 

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