The ranking depends on the selected sample
There is no universal frequency window. CCM lets you compare retained result windows from 50 through 1,000 accepted results when that much history is available.
Changing the window can change which numbers appear near the top or bottom of the frequency ranking because the underlying sample has changed. That is why every frequency comparison should keep its sample size visible.
Recent frequency does not make a result more likely next
On a fair wheel, appearing more often in recent history does not increase a number's mathematical chance on the next independent spin.
The reverse is also true: appearing less often does not make a number owed a result. Recorded frequency describes what happened in the selected sample, not what must happen next.
Use frequency as a descriptive measure
A frequency ranking can make a large history easier to scan when the window and calculation are visible.
For careful review, look at the actual count, sample size and gap rather than treating a ranking position as a recommendation.
Current CCM data
Watch the frequency ranking change when the sample changes.
Use the Results window selector to compare recent frequency over a short sample with a larger retained sample. A number can move up or down the ranking simply because the window changed.
That is why CCM treats higher- and lower-frequency results as descriptions of the selected history rather than evidence about the next independent spin.
CCM tools organise virtual practice and recorded roulette information. Historical counts, gaps, streaks and labels describe the selected record; they do not change the mathematics of an independent fair spin.