valet-de-chambre vs waitress

valet-de-chambre

noun

  • A valet. 

  • The personal servant of a monarch. 

waitress

noun

  • A female attendant who serves customers in a restaurant, café, or similar. 

verb

  • To work as a waitress. 

How often have the words valet-de-chambre and waitress occurred in a corpus of books? (source: Google Ngram Viewer )