competency vs fu

competency

noun
  • The ability to perform some task; competence. 

  • Implicit knowledge of a language’s structure. 

  • Meeting specified qualifications to perform. 

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 competency and fu occurred in a corpus of books? (source: Google Ngram Viewer )