continuation vs progression

continuation

noun
  • The act or state of continuing or being continued; uninterrupted extension or succession 

  • That which extends, increases, supplements, or carries on. 

  • A representation of an execution state of a program at a certain point in time, which may be used at a later time to resume the execution of the program from that point. 

  • A successful shot that, despite a foul, is made with a single continuous motion beginning before the foul, and that is therefore valid in certain forms of basketball. 

progression

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

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

  • chord progression 

  • The act of moving from one thing to another. 

  • Development, increase, evolution. 

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

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