air raid vs bomber

air raid

noun
  • An attack on a surface target by aircraft. 

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

bomber

noun
  • A military aircraft designed to carry and drop bombs. 

  • A person who sets bombs, especially as an act of terrorism. 

  • A 22-ounce beer bottle. 

  • A large cannabis cigarette. 

adj
  • Completely solid and secure, usually referring to some form of protective gear. 

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