outgrowth vs polyp

outgrowth

noun
  • An appendage of an animal. 

  • A branch or offshoot of a plant. 

  • Excessive growth. 

  • A byproduct or consequence of an action or event. 

polyp

noun
  • A cylindrical coelenterate, such as the hydra, having a mouth surrounded with tentacles. 

  • An abnormal growth protruding from a mucous membrane. 

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