chronicle vs ephemeris

chronicle

verb
  • To record in or as in a chronicle. 

noun
  • A written account of events and when they happened, ordered by time. 

ephemeris

noun
  • Computer software that calculates the apparent position of celestial bodies. 

  • A table giving the apparent position of celestial bodies throughout the year; normally given as right ascension and declination. 

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