doubling vs enlargement

doubling

noun
  • A pleat or fold. 

  • The process or an instance of making something double; a multiplication by two. 

  • The act of turning around, or doubling back. 

enlargement

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

  • An act or instance of making something larger. 

  • A making more obvious or serious; exacerbation. 

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

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