posterior vs rump

posterior

noun
  • The hinder parts of the body. 

  • The probability that a hypothesis is true (calculated by Bayes' theorem). 

adj
  • Following in order or in time. 

  • Next to, or facing the main stem or axis. 

  • Relating to or denoting presentation of a fetus in which the rear or caudal end is nearest the cervix and emerges first at birth. 

rump

noun
  • The hindquarters of a four-legged mammal, not including its legs 

  • The buttocks. 

  • A cut of meat from the rump of an animal. 

  • A remnant, as in Rump Parliament. 

verb
  • To turn one's back on, to show one's (clothed) backside to, as a sign of disrespect. 

  • To fuck. (Compare bum (verb).) 

  • To cheat. 

  • To ramble; to move (or talk) aimlessly. 

  • To move (someone or something) around. 

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