datum vs verification

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. 

verification

noun
  • A formal phrase used in concluding a plea, to denote confirmation by evidence. 

  • The state of being verified. 

  • Confirmation; authentication. 

  • The operation of testing the equation of a problem, to see whether it truly expresses the conditions of the problem. 

  • The act of verifying. 

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