(b) "Basic shared parenting" means an arrangement under which one parent keeps a child or children overnight for less than thirty-five percent of the year and under which both parents contribute to the expenses of the child or children in addition to the payment of child support.
(c) "Extended shared parenting" means an arrangement under which each parent keeps a child or children overnight for more than thirty-five percent of the year and under which both parents contribute to the expenses of the child or children in addition to the payment of child support.