anterior vs rear end

anterior

adj
  • 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. 

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

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

rear end

noun
  • The back or hindmost part of anything, such as a car. 

  • The buttocks. 

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