prominence vs tubercle

prominence

noun
  • 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. 

  • Relative importance. 

tubercle

noun
  • A round nodule, small eminence, or warty outgrowth, especially those found on bones for the attachment of a muscle or ligament or small elevations on the surface of a tooth. 

  • A small rounded nodule forming the characteristic lesion of tuberculosis. 

  • A small rounded wartlike protuberance of the roots of some leguminous plants; the lip of certain orchids, cacti. 

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