curiosity vs nonesuch

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. 

nonesuch

noun
  • A person or thing with no equal. 

  • Silene chalcedonica (syn. Lychnis chalcedonica) 

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