rising vs soon-to-be

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. 

soon-to-be

adj
  • Planned or destined to have a specified position or quality in the near future. 

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