An apparatus includes a memory and a controller. The memory includes a plurality of memory devices. The controller may be coupled to the memory and configured to process a plurality of read/write operations to/from the memory, store data in the plurality of memory devices using units of super-blocks, and generate a number of unique weight statistics in a single read operation by reading a number of dies within a super-block with dissimilar read reference voltages. Each super-block generally includes a block from a die of each of the plurality of memory devices. The controller may be further configured to split the number of dies in each super-block into two sets and collect page weights for upper pages from one of the two sets and page weights for lower pages from the other of the two sets.