Hurting Hermione's Hiney

What would've happened if Bellatrix had taken a different, more painful approach to interrogating Hermione? Hermione does have a proud personality, but how long will that last against a merciless spanking at the hands of a madwoman? I thought it would've been longer, but I didn't really have much to go with, I haven't read the books or movies Bellatrix has appeared in, only 1-3...