Bone-in Turkey Breast Cook Time

First time smoking a turkey. I have two bone-in turkey breasts that I will be brining today. Both of them are about 5.5 pounds. How long can I expect for them to take to cook?

The recipe for the bone-in turkey breast doesn't give an approximate cook time except that of the temp table, but could it really only take an hour and a half to cook a single bone-in breast?

Thanks in advance for any help.