12 vs po-po

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. 

po-po

noun
  • Synonym of police. 

  • Synonym of police officer. 

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