enclosure vs envelopment

enclosure

noun
  • Something enclosed, i.e. inserted into a letter or similar package. 

  • The area of a convent, monastery, etc where access is restricted to community members. 

  • The act of separating and surrounding an area, domain, or amount of something with a barrier. 

  • An area, domain, or amount of something partially or entirely enclosed by barriers. 

  • The act of enclosing, i.e. the insertion or inclusion of an item in a letter or package. 

  • The act of restricting access to ideas, works of art or technologies using patents or intellectual property laws. 

  • The post-feudal process of subdivision of common lands for individual ownership. 

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. 

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