superiorness vs supremacy

superiorness

noun
  • The state or quality of being superior. 

supremacy

noun
  • The quality of being supreme. 

  • The ideology that a specified group is superior to others or should have supreme power over them. 

  • Power over all others. 

  • A state of privilege for a specified group relative to other people in society. 

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