apt vs skilled

apt

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

  • Suitable; appropriate; fit or fitted; suited. 

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

noun
  • An apartment; a flat. 

skilled

adj
  • Requiring special abilities or training. 

  • Having or showing skill; skillful. 

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