curiosity vs oddity

curiosity

noun
  • A unique or extraordinary object which arouses interest. 

  • Inquisitiveness; the tendency to ask and learn about things by asking questions, investigating, or exploring. 

oddity

noun
  • An odd or strange thing or opinion. 

  • Strangeness. 

  • A strange person; an oddball. 

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