If it's potted in peat, water it rarely (monthly or every other month perhaps) and you should be OK, whenever the peat is bone dry. Peat takes far too long to dry out for me to be able to grow succulents in it (they melt/rot) so I don't use peat really at all.
I repot all succulents into a mix of NAPA floor dry which is expanded diatomaceous earth and pea gravel with a very, very tiny amount of peat or coco coir - less than 10% of the mix. Basically just enough to bind the minerals and keep them from falling out of the holes in the bottom of the pot. You can't see it in my mix but it's in there. This mix dries out totally bone dry in 2-3 days. You can also use Turface or Aquatic Plant Soil alone (or in place of the NAPA) both of these are tiny baked clay particles that absorb water and dry out in a couple days.