newspaper vs periodical

newspaper

noun
  • A publication, usually published daily or weekly and usually printed on cheap, low-quality paper, containing news and other articles. 

  • A quantity of or one of the types of paper on which newspapers are printed. 

verb
  • To cover with newspaper. 

  • To engage in the business of journalism 

periodical

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

  • 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. 

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 newspaper and periodical occurred in a corpus of books? (source: Google Ngram Viewer )