charlady vs dry cleaner

charlady

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

dry cleaner

noun
  • A person whose business is the dry cleaning of clothes and other fabrics. 

  • A business establishment that engages in the dry cleaning of clothes and other fabrics. 

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