exceptional vs rare

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 

rare

adj
  • Very uncommon; scarce. 

  • Thin; of low density. 

  • Particularly of meat, especially beefsteak: cooked very lightly, so the meat is still red. 

  • Good; enjoyable. 

noun
  • A scarce or uncommon item. 

verb
  • To rear, bring up, raise. 

  • To rear, rise up, start backwards. 

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