ligature vs vinculum

ligature

noun
  • The state of being bound or stiffened; stiffness. 

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

  • 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. 

verb
  • To ligate; to tie. 

vinculum

noun
  • A ligament that limits the movement of an organ or part. 

  • A bond or link signifying union. 

  • A horizontal line over the top of some of the terms in an expression, indicating that that part of the calculation is to be done before other parts. 

  • Specifically, the horizontal line between the numerator and denominator in a fraction. 

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