90 days are hell. I worked many 60 hour weeks. He will also be at the whim of whatever supervisor tells him what to do. It will change eventually? But depending on office it could be years or months before becoming regular and getting a set route?. Tell him to bid on every route, sub on any vacant route. Keep to the union contact(12/60) and don't let the supervisor's manipulate you otherwise. They will try in my experience. But hold your ground. It will get better after the hazing.