Aggressor vs Army

Aggressor

name

  • a fictional state created by the United States Army for maneuver and military exercise purposes in the 1950's 

noun

  • a citizen/subject of the fictional Aggressor state 

Army

name

  • A sports team representing the US Military Academy at West Point. 

  • Hexagram 7 of the I Ching (䷆) 

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