How long is the timing of the ghunnah when you stop on a meem or noon with a shaddah on it. Is it akmal ghunnah or less?

Question
How long is the timing of the ghunnah when you stop on a meem or noon with a shaddah on it. Is it akmal ghunnah or less?
Answer
Anytime there is a shaddah on a noon a meem, they have the longest ghunnah (akmal).