extroversion vs perspicuity

extroversion

noun
  • A personality orientation towards others and things outside oneself; behavior expressing such orientation. 

  • The condition of being inside out, especially in relation to the bladder. 

perspicuity

noun
  • Clarity, lucidity, especially in expression; the state or characteristic of being perspicuous. 

  • Transparency; translucence. 

  • Perspicacity; insight. 

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