“经常在白天地”这种表述在语法上不太准确，推测你可能想表达的是“经常在白天” ，其英文可以表达为“often during the day” 或者 “frequently in the daytime” 。
例如：
He often during the day does his homework.（他经常在白天做作业。 ）
She frequently goes for a walk in the daytime.（她经常在白天去散步。 ）