extroversion vs self-questioning

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. 

self-questioning

noun
  • contemplation on one's actions, beliefs, etc. 

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