enlargement vs piling up

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. 

piling up

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