different vs unique

different

adj
  • Unlike most others; unusual. 

  • Not the same; exhibiting a difference. 

  • Distinct, separate; used for emphasis after numbers and other determiners of quantity. 

  • Various, assorted, diverse. 

noun
  • The different ideal. 

adv
  • Differently. 

unique

adj
  • Of a rare quality, unusual. 

  • Being the only one of its kind; unequaled, unparalleled or unmatched. 

  • Of a feature, such that only one holder has it. 

  • Particular, characteristic. 

noun
  • A thing without a like; something unequalled or unparallelled; one of a kind. 

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