Physical diversity in a meshed Frame Relay network

I'm in the process of spec'ing out a meshed Frame Relay network and would like to have as much physical diversity in the mesh as possible. The plan is to have 2 or more FR lines into each location, running in separate bundles, preferably in separate conduits and thru separate paths back to the CO, and then have each FR line terminated on a different switch. I'd love suggestions on how to actually achieve this. Are there any special terms to use to specify this? Is there any way to determine if we are actually *getting* it, if it's so specified? Thanks! jc (please don't wander off into discussions of "why FR?" as this has already been decided)