There isn't much of a part time culture out here because generally employers have to pay to sponsor their staff and the cost of that is the same if they work part time or full time. Generally again the hours are longer and the pay lower than in Europe. This is because for any job there is someone from the subcontinent willing to do it for less.
There are some good jobs in the UAE for expat spouses. If you let us know what line of work your wife would be looking for it would be easier to offer more specific advice.