envelopment vs terminus

envelopment

noun
  • That which envelops; a covering. 

  • An offensive action in which an attacking force moves over or around the enemy and attacks from the rear; see also pincer movement. 

  • The act of enveloping. 

  • An action to seize the opponent's blade in one line and lead it (without losing contact) through a full circle to end in the same line. 

terminus

noun
  • A boundary or border, or a post or stone marking such a boundary. 

  • The end point of a transportation system, or the town or city in which it is located. 

  • The end or final point of something. 

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