spending vs upkeep

spending

noun
  • An amount that has been, or is planned to be spent. 

upkeep

noun
  • Maintenance; the act or effort of keeping something in good and working condition. 

verb
  • Do you know how to upkeep a boat? 

  • To maintain (something) or keep it in good repair. 

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