charlady vs housemaid

charlady

noun
  • A woman who cleans houses and offices as an occupation. 

housemaid

noun
  • A female domestic worker attached to the non-servant quarter part of the house, as opposed to a scullery maid. 

  • A housewife. 

verb
  • To be a housemaid. 

  • To wait on someone hand on foot, to watch them. 

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