invention vs outgrowth

invention

noun
  • The act of inventing. 

  • Something invented. 

  • The capacity to invent. 

  • A small, self-contained composition, particularly those in J.S. Bach’s Two- and Three-part Inventions. 

outgrowth

noun
  • A byproduct or consequence of an action or event. 

  • An appendage of an animal. 

  • A branch or offshoot of a plant. 

  • Excessive growth. 

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