piled vs unified

piled

adj
  • Formed from a pile or fagot. 

  • Having a pile or point; pointed. 

  • Having a pile or nap. 

unified

adj
  • united into a whole 

  • that serves all grade levels between kindergarten and twelfth grade. 

  • that operates as a single entity 

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