anti-aircraft vs firing

anti-aircraft

noun
  • Anti-aircraft fire. 

  • Anti-aircraft artillery. 

  • An anti-aircraft artillery organization. 

adj
  • Intended to attack aircraft. 

firing

noun
  • The fuel for a fire. 

  • Cauterization. 

  • The process of applying heat or fire, especially to clay, etc., to produce pottery. 

  • The dismissal of someone from a job. 

  • The discharge of a gun or other weapon. 

  • The act of adding fuel to a fire. 

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