reduction vs span

reduction

noun
  • a transformation of one problem into another problem, such as mapping reduction or polynomial reduction. 

  • An arrangement for a far smaller number of parties, e.g. a keyboard solo based on a full opera. 

  • A reduced price of something by a fraction or decimal. 

  • The act, process, or result of reducing. 

  • The amount or rate by which something is reduced, e.g. in price. 

  • A reaction in which electrons are gained and valence is reduced; often by the removal of oxygen or the addition of hydrogen. 

  • The rewriting of an expression into a simpler form. 

  • The process of rapidly boiling a sauce to concentrate it. 

  • A philosophical procedure intended to reveal the objects of consciousness as pure phenomena. (See phenomenological reduction.) 

  • The ratio of a material's change in thickness compared to its thickness prior to forging and/or rolling. 

  • A medical procedure to restore a fracture or dislocation to the correct alignment, usually with a closed approach but sometimes with an open approach (surgery). 

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. 

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