ballad vs words

ballad

noun
  • A slow romantic song. 

  • A kind of narrative poem, adapted for recitation or singing; especially, a sentimental or romantic poem in short stanzas. 

verb
  • To compose or sing ballads. 

words

noun
  • Lyrics. 

  • Angry debate or conversation; argument. 

  • Lines in a script for a performance. 

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