augment vs upgrade

augment

noun
  • An increase. 

  • In some Indo-European languages, a prefix e- (a- in Sanskrit) indicating a past tense of a verb. 

  • In some Bantu languages, an additional vowel prepended to the noun prefix. 

verb
  • To slow the tempo or meter, e.g. for a dramatic or stately passage. 

  • To increase; to make larger or supplement. 

  • To grow; to increase; to become greater. 

  • To add an augment to. 

  • To increase an interval, especially the largest interval in a triad, by a half step (chromatic semitone). 

upgrade

noun
  • An improvement 

  • An upward grade or slope. 

  • An improved component or replacement item, usually applied to technology 

verb
  • To improve, usually applied to technology, generally by complete replacement of one or more components 

  • To replace with something better. 

  • To improve the equipment or furnishings of or services rendered to 

  • To replace a program with a later version of itself, a version having a higher version number or marketed under a more recent product name. 

  • To improve in condition or status. 

adv
  • Up a slope or grade. 

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