exceptional vs prominence

exceptional

noun
  • An exception, or something having an exceptional value 

adj
  • Corresponding to something of lower dimension under a birational correspondence. 

  • Forming an exception; not ordinary; uncommon; rare. 

  • Better than the average; superior due to exception or rarity. 

prominence

noun
  • Relative importance. 

  • A bulge: something that bulges out or is protuberant or projects from a form. 

  • The state of being prominent: widely known or eminent. 

  • Autonomous height; relative height or prime factor; a concept used in the categorization of hills and mountains. 

  • A gaseous projection, often loop-shaped, springing from the surface of the Sun or a star. 

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