comparative vs rivaling

comparative

noun
  • A construction showing a relative quality, in English usually formed by adding more or appending -er. For example, the comparative of green is greener; of evil, more evil. 

  • A word in the comparative form. 

  • Data used to make a comparison. 

adj
  • Approximated by comparison; relative. 

  • Of or relating to comparison. 

  • Using comparison as a method of study, or founded on something using it. 

rivaling

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