cacophony vs symphony

cacophony

noun
  • A mix of discordant sounds; dissonance. 

symphony

noun
  • Harmony in music or colour, or a harmonious combination of elements. 

  • An instrumental introduction or termination to a vocal composition. 

  • An extended piece of music of sophisticated structure, usually for orchestra. 

  • A symphony orchestra. 

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