Document of certification

You enchant a piece of parchment, stone tablet or other writing surface with texts of knowledge it usually takes years to achieve. Any creature that takes it’s action to read the text gains proficiency in any skill you choose during the casting of the spell. When the spell ends the creature loses any proficiencies gained from this spell, and cannot benefit from this spell until the end of its next short or long rest. 

At higher levels: You can choose one extra proficiency to add or you can target an additional writing surface.