progression vs subduction

progression

noun
  • The act of moving from one thing to another. 

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

  • chord progression 

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

  • Development, increase, evolution. 

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

subduction

noun
  • The action of being pushed or drawn beneath another object. 

  • The process of one tectonic plate moving beneath another and sinking into the mantle at a convergent plate boundary. 

  • Arithmetical subtraction. 

  • A surjection between diffeological spaces such that the target is identified as the pushforward of the source. 

  • The act of subducting or taking away. 

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