partial ordering relation vs scheme

partial ordering relation

noun
  • A partial order. 

scheme

noun
  • An orderly combination of related parts. 

  • A council housing estate. 

  • A systematic plan of future action. 

  • A plot or secret, devious plan. 

  • A mathematical structure that enlarges the notion of algebraic variety in several ways, such as taking account of multiplicities and allowing "varieties" defined over any commutative ring (e.g. Fermat curves over the integers). 

  • A chart or diagram of a system or object. 

  • Part of a uniform resource identifier indicating the protocol or other purpose, such as http: or news:. 

  • A representation of the aspects of the celestial bodies for any moment or at a given event. 

  • A portfolio of pension plans with related benefits comprising multiple independent members. 

verb
  • To plot, or contrive a plan. 

  • To plan; to contrive. 

How often have the words partial ordering relation and scheme occurred in a corpus of books? (source: Google Ngram Viewer )