Very interesting and exciting find out of a penny box I was going through. I believe I found a 1903 Misplaced Date variety, specifically MPD-007 (FS-302) in the CherryPicker's Guide or 1903 Snow-6. I was happy enough to get another Indian Head cent from a roll, as I do not come by them often, but was even more excited to see it being an awesome error, and one I do not have any of at the moment! I am also happy with the condition the coin is in. It isn't in the best shape, but is much better than the majority of Indian cents I have pulled from rolls in the past.
I don't remember exactly how long it has been since I found my last one. I would say it has been at least a year at this point personally, but that doesn't mean it will take others that long to find one, lots of possible factors to account for.