Nickel is the right spelling. Full steps are tough. I check to find examples on the PCGS and figured out that most of the ones they slabbed, to me were not full steps. Then I had to re-thing the idea. They are counting the risers and not the steps as being full.
But I gave up looking for these a long time ago. Just not my interest. I prefer die varieties. These are a striking/handling issue. Same also on the full bell lines. But I do enjoy looking for full bands on the Mercury dimes. (They make sense) The Nickels and halves are too subjective.