Army vs Encampment

Army

name
  • Hexagram 7 of the I Ching (䷆) 

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

Encampment

name
  • a Chinese constellation located near Pegasus, one of the 28 lunar mansions and part of the larger Black Turtle. 

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