downgrade vs move up

downgrade

verb
  • To place lower in position. 

  • to reduce the official estimate of a storm's intensity. 

  • To reduce in complexity, or remove unnecessary parts; to dumb down. 

  • To revert software back to an older version. 

  • To disparage. 

noun
  • A reduction of a rating, as a financial or credit rating. 

  • A downhill gradient on a road or railway. 

move up

verb
  • To move one's position to allow others to occupy a place. 

  • To raise, put onto a higher place. 

  • To move forward (especially when waiting in a queue / line). 

  • To be promoted. 

  • To pass to a higher level. 

  • To put higher on a list. 

  • To promote, put onto a higher level. 

  • To reschedule (something) to an earlier date or time. 

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