derived vs unoriginal

derived

adj
  • A product of derivation 

  • Of, or pertaining to, conditions unique to the descendant species of a clade, and not found in earlier ancestral species. 

unoriginal

adj
  • Lacking originality. 

  • Not being the first or earliest version of something, not original. 

noun
  • A person or work that does not exhibit originality. 

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