billowy vs rising

billowy

adj
  • Swelling or swollen into large waves; full of billows or surges; resembling billows. 

rising

adj
  • Planned or destined to advance to an academic grade in the near future, after having completed the previous grade; soon-to-be. 

  • Going up. 

noun
  • The act of something that rises. 

  • Rebellion. 

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