higher-order vs sapient

higher-order

adj
  • Involving more sophisticated thinking or reasoning. 

  • Of or relating to a class higher up in a hierarchy. 

sapient

adj
  • Attempting to appear wise or discerning. 

  • Of a species or life-form, possessing intelligence or self-awareness. 

noun
  • An intelligent, self-aware being. 

How often have the words higher-order and sapient occurred in a corpus of books? (source: Google Ngram Viewer )