Bacchanalian vs bacchic

Bacchanalian

adj
  • Of or pertaining to the festival of Bacchus; relating to or given to reveling and drunkenness. 

noun
  • A bacchanal; a drunken reveler. 

bacchic

adj
  • Of or relating to Bacchus; hence, jovial, or riotous, with intoxication; bacchanalian. 

  • Relating to a bacchius. 

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