inveterate vs uncommon

inveterate

adj
  • Malignant; virulent; spiteful. 

  • firmly established from having been around for a long time; of long standing 

  • Having had a habit for a long time 

uncommon

adj
  • Rare; not readily found; unusual. 

  • Remarkable; exceptional. 

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