region vs topology

region

noun
  • A place in or a part of the body in any way indicated. 

  • Any considerable and connected part of a space or surface; specifically, a tract of land or sea of considerable but indefinite extent; a country; a district; in a broad sense, a place without special reference to location or extent but viewed as an entity for geographical, social or cultural reasons. 

  • A subnational region of Chile; equivalent to province. 

  • An administrative subdivision of the European Union. 

  • A subprovincial region of Quebec; the primary level subdivision; a prefecture. 

  • The inhabitants of a region or district of a country. 

  • Such a division of the city of Rome and of the territory about Rome, of which the number varied at different times; a district, quarter, or ward. 

topology

noun
  • The anatomical structure of part of the body. 

  • The properties of a particular technological embodiment that are not affected by differences in the physical layout or form of its application. 

  • The topographical study of geographic locations or given places in relation to their history. 

  • The arrangement of nodes in a communications network. 

  • The branch of mathematics dealing with those properties of a geometrical object (of arbitrary dimensionality) that are unchanged by continuous deformations (such as stretching, bending, etc., without tearing or gluing). 

  • Any collection τ of subsets of a given set X that contains both the empty set and X, and which is closed under finitary intersections and arbitrary unions. 

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