datum vs journal

datum

noun
  • A fact known from direct observation. 

  • 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. 

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

journal

noun
  • A general journal. 

  • A newspaper or magazine dealing with a particular subject. 

  • The amount of land that can be worked in a day. 

  • The part of a shaft or axle that rests on bearings. 

  • A chronological record of changes made to a database or other system; along with a backup or image copy that allows recovery after a failure or reinstatement to a previous time; a log. 

  • A chronological record of payments or receipts. 

  • A diary or daily record of a person, organization, vessel etc.; daybook. 

verb
  • To scrapbook. 

  • To archive or record something. 

  • To insert (a shaft, an axle, etc) into a journal bearing. 

  • To insert (a shaft, etc.) in a journal bearing. 

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