bead vs torus

bead

noun
  • A narrow molding with semicircular section. 

  • A bubble, in spirits. 

  • Each in a string of small balls making up the rosary or paternoster. 

  • Knowledge sufficient to direct one's activities to a purpose. 

  • A small, round ball at the end of a barrel of a gun used for aiming. 

  • A small drop of water or other liquid. 

  • A small, round object with a hole to allow it to be threaded on a cord or wire, particularly for decorative purposes. 

  • A rigid edge of a tire that mounts it on a wheel; tire bead. 

  • Various small, round solid objects. 

verb
  • To cause beads to form on (something). 

  • To apply beads to. 

  • To form into a bead. 

torus

noun
  • A large convex molding, typically semicircular in cross section, which commonly projects at the base of a column and above the plinth. 

  • The thickening of a membrane closing a wood-cell pit (as of gymnosperm tracheids) having the secondary cell wall arched over the pit cavity. 

  • A rounded ridge of bone or muscle, especially one on the occipital bone. 

  • {{lb|en|topology|in combination|n-torus|4-torus|etc.}} The product of the specified number of circles. 

  • A topological space which is a product of two circles. 

  • The end of the peduncle or flower stalk to which the floral parts (or in the Asteraceae, the florets of a flower head) are attached. 

  • A ring-shaped object, especially a large ring-shaped chamber used in physical research. 

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