anterior vs obverse

anterior

adj
  • Nearer the forward end, especially in the front of the body; nearer the head or forepart of an animal. 

  • Pronounced with an obstruction located in front of the palato-alveolar region of the mouth, e.g. b, p, d, t. 

  • (of a part of a flower or leaf) Situated further away from the mainstem. 

  • Coming before or earlier in time or development, prior to, preceding. 

obverse

adj
  • Turned or facing toward the observer. 

  • Corresponding; complementary. 

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

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. 

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