inception vs outgrowth

inception

noun
  • A layering, nesting, or recursion of something. 

  • The creation or beginning of something; the establishment. 

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. 

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