AA vs anti-aircraft

AA

noun

  • An AA battery (energy-storage device). 

  • A member of Alcoholics Anonymous. 

verb

  • To antialias. 

name

  • USPS military code of Armed Forces – Americas. 

  • Double-A: the second-highest level of play in Minor League Baseball after Triple-A (AAA). 

anti-aircraft

adj

  • Intended to attack aircraft. 

noun

  • Anti-aircraft artillery. 

  • An anti-aircraft artillery organization. 

  • Anti-aircraft fire. 

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