almanac vs periodical

almanac

noun
  • A handbook, typically published annually, containing information on a particular subject 

  • A book or table listing nautical, astronomical, astrological or other events for the year; sometimes, but not essentially, containing historical and statistical information. 

  • A GPS signal consisting of coarse orbit and status information for each satellite in the constellation. 

periodical

noun
  • A regularly issued thematic publication that contains the most current information in its field, often the primary means for communication of original scholarship or creative work at the cutting edge of research in its field. 

  • A publication issued regularly, but less frequently than daily. 

adj
  • Periodic. 

  • Published at regular intervals of more than one day, especially weekly, monthly, or quarterly. 

  • Of, or relating to such a publication. 

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