enlargement vs upgrowth

enlargement

noun
  • An act or instance of making something larger. 

  • Diffuseness of speech or writing; a speaking at length. 

  • A making more obvious or serious; exacerbation. 

  • An image, particularly a photograph, that has been enlarged. 

upgrowth

noun
  • The process or result of growing up; progress; development. 

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