obverse vs other side

obverse

noun
  • A proposition obtained by obversion, e.g. All men are mortal => No man is immortal. 

  • The heads side of a coin, or the side of a medal or badge that has the principal design. 

adj
  • Corresponding; complementary. 

  • Having the base, or end next to the attachment, narrower than the top. 

  • Turned or facing toward the observer. 

other side

noun
  • The afterlife, as a supernatural realm inhabited by spirits of deceased people. 

  • Used other than figuratively or idiomatically: see other, side. 

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