progression vs upgrowth

progression

noun
  • Development, increase, evolution. 

  • A sequence obtained by adding or multiplying each term by a constant. 

  • chord progression 

  • The act of moving from one thing to another. 

  • The act of moving forward or proceeding in a course; motion onward. 

  • The making an exercise more exerting by manipulating the details of its performance like loaded weight, range of motion, angle, speed. 

upgrowth

noun
  • The process or result of growing up; progress; development. 

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