12 vs five-o

12

noun
  • Collectively, police or law enforcement. 

  • See also: fuck 12 

symbol
  • Used by fans of American football, positioning themselves as the 12th member of an 11-player team. 

five-o

noun
  • The police. 

How often have the words 12 and five-o occurred in a corpus of books? (source: Google Ngram Viewer )