To find these, search the exact keyword in quotes on Etsy or Depop. Sellers who understand the niche will list their items this way to attract knowledgeable buyers.
During the Great Depression and WWII, practicality ruled. "Frivolous" was a daring word for a dress. To call a garment frivolous was to say: Buy this not because you need it, but because it makes you happy.
“Frivolous Dress Order Vol7 56” as a title suggests an overly vague, potentially unenforceable, and morale-harming policy. No such real order exists in public records. If this is an internal document, it should be revised for clarity and fairness.