I don't know how this is important in storing your seedphrase but I think you also made a mistake in the terms private and secret. Keeping something Private means that it should be Kept to oneself you and you alone. A secret has to be amongst two or more person for it to be a secret. You literally mixed the two words together..

But then it won't matter much. If you know you can trust your wife or partner with your seedphrase, then it's important to let someone know they exist. But honestly I don't think would be doing that. It's meant to be private so I'll store it some where only I knows about..