datum vs rationalization

datum

noun
  • A premise from which conclusions are drawn. 

  • A floating reference point, or SLDMB, used to evaluate surface currents in a body of water. Often employed by coastal search and rescue. 

  • A fixed reference point or set of reference points which precisely define a system of measurement or a coordinate system. 

  • A fact known from direct observation. 

verb
  • To provide missing data points by using a mathematical model to extrapolate values that are outside the range of a measuring device. 

rationalization

noun
  • A statement of one's motives, or of the causes of some event. 

  • The concealment of true motivation in some non-threatening way. 

  • The process or result of rationalizing. 

  • The simplification of an expression without changing its value. 

  • A reorganization of a company or organization in order to improve its efficiency. 

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