apt vs due

apt

adj
  • Suitable; appropriate; fit or fitted; suited. 

  • Ready; especially fitted or qualified (to do something); quick to learn. 

  • Having a habitual tendency; habitually liable or likely; disposed towards. 

noun
  • An apartment; a flat. 

due

adj
  • Appropriate. 

  • Owing; ascribable, as to a cause. 

  • Owed or owing. 

  • Scheduled; expected. 

  • On a direct bearing, especially for the four points of the compass 

  • Having reached the expected, scheduled, or natural time. 

noun
  • Deserved acknowledgment. 

  • That which is owed; debt; that which belongs or may be claimed as a right; whatever custom, law, or morality requires to be done, duty. 

  • Right; just title or claim. 

  • A membership fee. 

adv
  • Directly; exactly. 

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