cacophonous vs euphonious

cacophonous

adj
  • Containing, consisting of, or producing harsh, unpleasant or discordant sounds. 

euphonious

adj
  • Of sounds, especially speech: demonstrating or possessing euphony; agreeable to the ear; pleasant-sounding. 

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