Frequency of sheds is all dependent on how much/often you feed the snake. The more you feed it, the more it grows, the more it sheds. Like others have said, once you know what she looks like you'll know when she's in shed. Hypos are slightly more difficult, but they look ridiculous hypo, so you should still notice. Also, the scales on their belly tend to feel like they are loose and catch on your skin when they are in shed.