Writing screenplays is not my business. I've written half a dozen, and maybe half of those were made. But it was never a satisfying experience. It was just work. You're an employee. You would be told what to do. Studio execs would cross out my dialogue and put in their dialogue.
I'm not aware of a cadence when writing, but I hear it after. I write in longhand, and that helps. You're closer to it, and you have to cross things out. You put a line through it, but it's still there. You might need it. When you erase a line on a computer, it's gone forever.