fragrance vs odor

fragrance

noun

  • A pleasant smell or odour. 

verb

  • To apply a fragrance to; to perfume. 

odor

noun

  • Any smell, whether fragrant or offensive. 

  • A strong, pervasive quality. 

  • Esteem. 

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