exceptional vs mutant

exceptional

adj
  • Forming an exception; not ordinary; uncommon; rare. 

  • Corresponding to something of lower dimension under a birational correspondence. 

  • Better than the average; superior due to exception or rarity. 

noun
  • An exception, or something having an exceptional value 

mutant

adj
  • Strange, abnormal, or bizarre. 

  • Of, relating to, undergoing (i.e. mutating), or resulting from change or mutation; that has undergone mutation. 

noun
  • That has mutated, with one or more new characteristics from a mutation. 

  • Someone or something that seems strange, abnormal, or bizarre. 

  • Synonym of mutex 

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