grounds vs outgrowth

grounds

noun
  • Basis or justification for something. 

  • The sediment at the bottom of a liquid, or from which a liquid has been filtered. 

  • The collective land areas that compose a larger area. 

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 grounds and outgrowth occurred in a corpus of books? (source: Google Ngram Viewer )