datum vs suppose

datum

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

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. 

suppose

verb
  • To take for granted; to conclude, with less than absolute supporting data; to believe. 

  • To require to exist or to be true; to imply by the laws of thought or of nature. 

  • To put by fraud in the place of another. 

  • To theorize or hypothesize. 

  • To imagine; to believe; to receive as true. 

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