conserve vs keep going

conserve

verb
  • To remain unchanged during a process 

  • To protect an environment, heritage, etc. 

  • To save for later use, sometimes by the use of a preservative. 

noun
  • Wilderness where human development is prohibited. 

  • A jam or thick syrup made from fruit. 

keep going

verb
  • To continue functioning. 

  • To proceed; to make progress, physically or figuratively. 

  • To see that (a person) is continually supplied with something, or that they can progress or carry on. 

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