span vs sphere

span

noun
  • The space of all linear combinations of something. 

  • A portion of something by length; a subsequence. 

  • A small space or a brief portion of time. 

  • The spread or extent of an arch or between its abutments, or of a beam, girder, truss, roof, bridge, or the like, between supports. 

  • The time required to execute a parallel algorithm on an infinite number of processors, i.e. the shortest distance across a directed acyclic graph representing the computation steps. 

  • wingspan of a plane or bird 

  • The length of a cable, wire, rope, chain between two consecutive supports. 

  • Any of various traditional units of length approximating this distance, especially the English handspan of 9 inches forming ⅛ fathom and equivalent to 22.86 cm. 

  • A pair of horses or other animals driven together; usually, such a pair of horses when similar in color, form, and action. 

  • A rope having its ends made fast so that a purchase can be hooked to the bight; also, a rope made fast in the center so that both ends can be used. 

  • The full width of an open hand from the end of the thumb to the end of the little finger used as an informal unit of length. 

verb
  • To extend through the distance between or across. 

  • To extend through (a time period). 

  • To measure by the span of the hand with the fingers extended, or with the fingers encompassing the object. 

  • To generate an entire space by means of linear combinations. 

  • To fetter, as a horse; to hobble. 

sphere

noun
  • A regular three-dimensional object in which every cross-section is a circle; the figure described by the revolution of a circle about its diameter . 

  • The region in which something or someone is active; one's province, domain. 

  • The set of all points in three-dimensional Euclidean space (or n-dimensional space, in topology) that are a fixed distance from a fixed point . 

  • A spherical physical object; a globe or ball. 

  • Any of the concentric hollow transparent globes formerly believed to rotate around the Earth, and which carried the heavenly bodies; there were originally believed to be eight, and later nine and ten; friction between them was thought to cause a harmonious sound (the music of the spheres). 

  • The extension of a general conception, or the totality of the individuals or species to which it may be applied. 

  • An area of activity for a planet; or by extension, an area of influence for a god, hero etc. 

verb
  • To place in a sphere, or among the spheres; to ensphere. 

  • To make round or spherical; to perfect. 

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