leading vs posterior

leading

adj
  • Occurring in advance; preceding. 

  • Providing guidance or direction. 

  • Ranking first. 

noun
  • Vertical space added between lines; line spacing. 

  • An act by which one is led or guided. 

posterior

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. 

noun
  • The hinder parts of the body. 

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

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