apt vs felicitous

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. 

felicitous

adj
  • Appropriate, apt, fitting. 

  • Auspicious, fortunate, lucky. 

  • Causing happiness or pleasure. 

  • Of a sentence or utterance: semantically and pragmatically coherent; fitting in the context. 

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