I think it occurs at the same time of Skin Deep and Lacey. First rumple wears the same outfit, when turn Regina into the peasant and in Skin Deep (Make the deal and take her to the castle) and when Regina turned back he wears the same outfit when Belles get her hunting journey with Rumple. I think he was so busy with his wand and his “promising” girl to get after Reginas call. Also she is saying that her name was Wilma and in the end of Skin deep, when she is asking about his girl she sayd: “What was her name? Margi? Wilma…”
Rumple:”Belle”
Regina: “Right”
Ii think this is a hint from the wrighters to help us with the timeline. Maybe they read our prayers. 😉