More information please....May be the reason some chocolate bother me and others don't.
Is the “rotation diet” the same as the basic Celiac diet: Start with one, add another and another, but keep rotation up so no two are eaten on consecutive days?
Just look it up on the net. Her coffee/tea/chocolate allergy would let her drink coffee for several months, then she'd get sick and switch to tea for several months.
You don't have to worry about a schedule ~ the food will tell you all you need to know.