How many times do I have to use calm mind for it not to be effective anymore?

Question

Also please answer the same question but for the move withdraw instead. The reason I ask this is because I wanna make an effective mega slowbro bulky sweeper set and I need to know how many times I need to use calm mind/withdraw so I dont over do it and mess up.

Answer 1

Calm Mind raises the user's Special Attack and Special Defense by one stage each, meaning it can be used six times before losing effect.
Withdraw raises the user's Defense by one stage, meaning it, too, can be used effectively six times.

Hope I helped. :)
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