The current visit count metric is a lifetime count, regardless of the reporting period. This may be useful to some but can be misleading when you are looking for people who have visited a lot LATELY.
I know there is a plug-in to help you get visits for specific pre-determined timeframes, but it should be core functionality in both SiteCatalyst and Discover to answer the question:
How many visitors visited my site X times in ANY given timeframe?
(last week, month, a specific 12 day-period when I was running a sale, etc.)
I'm talking about a report that looks like this, for any reporting period:
Number of visits
IN THIS timeframe Visitors
1 visit..... 2,017
2 visits.... 1,340
3 visits.....