caretaker vs street sweeper

caretaker

noun
  • Someone who takes care of a place or thing; someone looking after a place, or responsible for keeping it in good repair. 

  • Someone who takes care of a person; a parent, carer or other guardian. 

adj
  • Temporary, on a short term basis. 

street sweeper

noun
  • A person who is employed to sweep streets, pavements, and gutters, keeping them clear of litter. 

  • A machine used to sweep streets. 

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