circuit vs torus

circuit

noun
  • The space enclosed within a circle, or within limits. 

  • The counties at the fringes of the empire, usually with a non-Chinese population, from the Han to the Western Jin. 

  • A thought that unconsciously goes round and round in a person's mind and controls that person. 

  • The act of moving or revolving around, or as in a circle or orbit; a revolution 

  • Major provincial divisions from the Yuan to early Republican China. 

  • The jurisdiction of certain judges within a state or country, whether itinerant or not. 

  • The basic grouping of local Methodist churches. 

  • A closed path, without repeated vertices allowed. 

  • A track on which a race in held; a racetrack 

  • By analogy to the proceeding three, a set of theaters among which the same acts circulate; especially common in the heyday of vaudeville. 

  • The 10 or so major provinces of the empire from the Tang to the early Yuan. 

  • A chain of cinemas/movie theaters. 

  • Enclosed path of an electric current, usually designed for a certain function. 

  • A regular or appointed trip from place to place as part of one's job 

  • That which encircles anything, as a ring or crown. 

  • The circumference of, or distance around, any space; the measure of a line around an area. 

torus

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

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

  • 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 circuit and torus occurred in a corpus of books? (source: Google Ngram Viewer )