Most people breed Frizzle to Smooth. Yielding half and half, in general.
Breeding frizzle to frizzle - yields all Frizzled birds yes, but creates about 1/3 of chicks with a double dose of Frizzle genes - a curly or Frazzle, those chicks DO NOT do well and usually must be culled. Lots of people don't like that idea at all. So they breed smooth to frizzle and avoid the problem.
I breed Sizzles so it's further complicated by silkie genes - lol. I can get Sizzle (the normal curly feather like a frizzle), sizzle (smooth normal feathers), the Frazzles, and silkie feathered birds, and curled silkie feathered birds. Which makes every hatch sort of a scatter gun adventure. I'll be selling off and culling a great many birds this next year.
Frizzles are NIFTY. I love it. I've even let a few Sizzle/Delaware eggs get set. What hatches out is anyone's guess, LOL.