air force vs platoon

air force

noun
  • A unit in the U.S. Air Force larger than a division but smaller than a command. 

  • A branch of the military mainly devoted to air warfare, as opposed to (land) army and navy. 

platoon

noun
  • A unit of thirty to forty soldiers typically commanded by a lieutenant and forming part of a company. 

  • A group of children in the platoon grouping education system. 

  • A group of self-driving vehicles travelling in a close convoy and communicating electronically with each other. 

verb
  • To specialize in a particular position or playing style. 

  • Of self-driving vehicles: to travel in a close convoy, each vehicle communicating electronically with the others. 

  • To alternate starts with a teammate of opposite handedness, depending on the handedness of the opposing pitcher 

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