oppugnant vs witherward

oppugnant

adj
  • opposing, antagonistic, contrary 

witherward

adj
  • Opposite, opposing; hostile. 

  • Adverse, contrary. 

  • at the witherward side of the year 

noun
  • Opposite; adversity, opposition; hostility 

adv
  • Contrary to, against. 

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