home help vs sitter

home help

noun
  • A person employed, especially by a social services department, to perform household chores and provide aid to a patient or infirm person in the latter's own home; a carer. 

  • The aid provided by such people. 

sitter

noun
  • One employed to watch or tend something; a babysitter, housesitter, petsitter, etc. 

  • A very easy scoring chance. 

  • A broody hen. 

  • A participant in a séance. 

  • Someone who sits, e.g. for a portrait. 

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