envelopment vs ligature

envelopment

noun
  • The act of enveloping. 

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

  • That which envelops; a covering. 

  • 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. 

ligature

noun
  • The act of tying or binding something. 

  • A piece used to hold a reed to the mouthpiece on woodwind instruments. 

  • The state of being bound or stiffened; stiffness. 

  • A character that visually combines multiple letters, such as æ, œ, ß or ij; also logotype. Sometimes called a typographic ligature. 

  • A group of notes played as a phrase, or the curved line that indicates such a phrase. 

  • A cord or similar thing used to tie something; especially the thread used in surgery to close a vessel or duct. 

  • Impotence caused by magic or charms. 

  • A curve or line connecting notes; a slur. 

  • A thread or wire used to remove tumours, etc. 

verb
  • To ligate; to tie. 

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