malodor vs perfume

malodor

noun
  • An offensive odor. 

perfume

noun
  • A substance created to provide a pleasant smell or one which emits an agreeable odor. 

  • A pleasant smell; the scent, odor, or odoriferous particles emitted from a sweet-smelling substance; a pleasant odor 

verb
  • To apply perfume to; to fill or impregnate with a perfume; to scent. 

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