aptitude vs fu

aptitude

noun
  • Natural ability to acquire knowledge or skill. 

  • The condition of being suitable. 

fu

noun
  • Expertise, mastery 

  • A Chinese literary form developed during the times of the Han dynasty that combines prose and poetry, sometimes called rhymed prose. 

  • flux unit 

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