ligature vs trouser

ligature

verb
  • To ligate; to tie. 

noun
  • 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. 

  • The act of tying or binding something. 

  • Impotence caused by magic or charms. 

  • A curve or line connecting notes; a slur. 

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

trouser

verb
  • To put (money) into one's trouser pocket; to pocket. 

  • To secretively steal (an item or money) for personal use. 

  • To take and keep (something, especially money, that is not one's own); to pocket. 

noun
  • A pair of trousers. 

  • Of or relating to trousers. 

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