How often do gallant emblems drop in kms?

From what I've noticed, PoTs drop more often the farther into the temple you go.

I spent hours in Memory Lane and barely found any, but in Oblivion 1 I find about 8 an hour (that's with 2x drop and a spider familiar)

This is true. It has been that way ever since the release of Temple of Time. If emblems drop at PoT rate in the oblivion area, I will be satisfied.