excrescence vs prominence

excrescence

noun
  • A disfiguring or unwanted mark or adjunct. 

  • The epenthesis of a consonant, e.g., warmth as [ˈwɔrmpθ] (adding a [p] between [m] and [θ]), or -t (Etymology 2). 

  • Something, usually abnormal, which grows out of something else. 

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 excrescence and prominence occurred in a corpus of books? (source: Google Ngram Viewer )