periodical vs tome

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. 

tome

noun
  • A large or scholarly book. 

  • One in a series of volumes. 

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