maid vs signorina

maid

noun
  • A girl or an unmarried young woman; maiden. 

  • A female servant or cleaner (short for maidservant). 

signorina

noun
  • A courtesy title for an unmarried woman of Italian origin. 

  • maitake, hen of the woods (mushroom) 

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