periodical vs typeface

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. 

typeface

noun
  • The surface of type which inked, or the impression it makes. 

  • The particular design of some type, font, or a font family. 

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