eastern vs eastward

eastern

adj

  • Of, facing, situated in, or related to the east. 

  • Oriental. 

  • Blowing from the east; easterly. 

eastward

adj

  • Situated or directed towards the east. 

adv

  • Towards the east. 

noun

  • The direction or area lying to the east. 

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