First you'll go through immigration. You'll probably be given forms in the plane to fill out, and you'll need to give those and your passport to the officer. They'll ask you questions about your visit, like whether your trip is business or pleasure, where you'll be visiting, and how long you'll be staying.
After immigration, you'll pick up any bags that you checked.
After that, you'll go through customs. You aren't allowed to bring fruits, vegetables, or meats into Germany, and they'll have some dogs wandering the hall sniffing bags as part of their check. If you aren't carrying anything that needs to be declared (like lots of money, or things that you'll be selling), you can head through green lines marked nothing to declare. Some airports have you hand in a customs card that you're given on the plane as you leave the area, but I don't remember if Frankfurt is one of them.
After customs is when you'll get out into the general waiting area and get to see your husband.
There are no cell phones allowed in immigration and customs, so wait until after you get through.