extrusive vs prominent

extrusive

adj
  • Jutting out; extruding. 

  • Of rocks: forced, while in a plastic or molten state, on to the Earth's surface to lie atop existing rocks. 

noun
  • Rock which has been formed through volcanic extrusion. 

prominent

adj
  • standing out, or projecting; jutting; protuberant 

  • likely to attract attention from its size or position; conspicuous 

  • eminent; distinguished above others 

noun
  • Any of various moths having a conspicuous projection on the inner margin of the wings. 

  • In Nazi concentration camps, an inmate entrusted with minor supervisory duties and rewarded with perquisites. 

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