expertness vs fu

expertness

noun
  • skill or proficiency 

  • The state of being expert. 

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