air raid vs shootout

air raid

noun
  • A passing-heavy offensive scheme based on a shotgun formation with four wide receivers and a single running back. 

  • An attack on a surface target by aircraft. 

shootout

noun
  • A decisive battle, especially a gunfight. 

  • A series of penalty shots during which a tied game is resolved. 

  • A multitable poker tournament in which only the last player on a table goes on to the next. 

  • A match in which both teams score highly. 

  • A penalty shootout. 

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