department vs partial ordering relation

department

noun
  • A part, portion, or subdivision. 

  • One of the divisions of instructions 

  • A territorial division; a district; especially, in France, one of the districts into which the country is divided for governmental purposes, similar to a county in the UK and in the USA. France is composed of 101 départements organized in 18 régions, each department is divided into arrondissements, in turn divided into cantons. 

  • A distinct course of life, action, study, or the like. 

  • A military subdivision of a country 

  • A specified aspect or quality. 

  • One of the principal divisions of executive government 

partial ordering relation

noun
  • A partial order. 

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