perfective aspect vs progress

perfective aspect

noun
  • A feature of the verb which denotes viewing the event the verb describes as a completed whole, rather than from within the event as it unfolds. For example, "she sat down" as opposed to "she was sitting down". Since the focus is on the completion of what is expressed by the verb, this aspect is generally associated with the past and future tenses. This term is often used interchangeably with aorist aspect. This is not to be confused with the perfect tense. 

progress

noun
  • Movement or advancement through a series of events, or points in time; development through time. 

  • Specifically, advancement to a higher or more developed state; development, growth. 

  • Movement onwards or forwards or towards a specific objective or direction; advance. 

  • An official journey made by a monarch or other high personage; a state journey, a circuit. 

  • Science has made extraordinary progress in the last fifty years. 

verb
  • To develop. 

  • To expedite. 

  • To move, go, or proceed forward; to advance. 

  • To improve; to become better or more complete. 

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