You know it when you see it. Defined, froth and/or frills consist of many yards of lightweight tullles and chiffons in whites or pastel colors. It can mean ruffles, poufed headpieces and flounces of organza petticoats; diaphonous layers of silk gauze. I'd say Max Chaoul and Monique Lhuillier are at the top of the list--master handlers of the art of the frill.
Raimon Bundo
Max Chaoul
Max Chaoul
Vera Wang
Monique Lhuillier
Raimon BundoMax ChaoulMax Chaoul 
Vera WangVera Wang is known for varied techniques and innovations, the high art of manipulating delicate fabrics one of them. The dress above is but one of her creations in lightweight silk.
Monique Lhuillier