importance vs superiority

importance

noun
  • significance or prominence. 

  • The quality or condition of being important or worthy of note. 

  • Something of importance. 

  • personal status or standing. 

superiority

noun
  • The state of being superior. 

  • The right which the superior enjoys in the land held by the vassal. 

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