care vs upkeep

care

noun
  • Maintenance, upkeep. 

  • Worry. 

  • The treatment of those in need (especially as a profession). 

  • The state of being cared for by others. 

  • Close attention; concern; responsibility. 

  • The object of watchful attention or anxiety. 

verb
  • To mind; to object. 

  • To want, to desire; to like; to be inclined towards. 

  • To be concerned (about), to have an interest (in); to feel concern (about). 

  • (with for) To look after or look out for. 

  • For it to matter to, or make any difference to. 

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 care and upkeep occurred in a corpus of books? (source: Google Ngram Viewer )