conserve vs spend

conserve

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

  • To protect an environment, heritage, etc. 

  • To remain unchanged during a process 

noun
  • Wilderness where human development is prohibited. 

  • A jam or thick syrup made from fruit. 

spend

verb
  • To consume, to use up (time). 

  • To waste or wear away; to be consumed. 

  • To bestow; to employ; often with on or upon. 

  • To exhaust, to wear out. 

  • To be diffused; to spread. 

  • To pay out (money). 

  • To break ground; to continue working. 

noun
  • Discharged semen. 

  • Expenditures; money or pocket money. 

  • Vaginal discharge. 

  • Amount of money spent (during a period); expenditure. 

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