annual vs ephemeris

annual

noun
  • A pantomime taking place once a year. 

  • An annual publication; a book, periodical, journal, report, comic book, yearbook, etc., which is published serially once a year, which may or may not be in addition to regular weekly or monthly publication. 

  • An annual plant; a plant with a life span of just one growing season; a plant which naturally germinates, flowers and dies in one year. Compare biennial, perennial. 

  • A medical checkup taking place once a year. 

adj
  • Happening once every year. 

  • Of, for, or relating to a whole year, often as a recurring cycle; determined or reckoned by the year; accumulating in the course of a year; performed, executed, or completed over the course of a year. See also circannual. 

  • Having a life cycle that is completed in only one growing season; e.g. beans, corn, marigold. See Annual plant in Wikipedia. Compare biennial, perennial. 

  • Living or lasting just one season or year, as certain insects or insect colonies. 

  • an annual general meeting; an annual publication 

ephemeris

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

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

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