In ArcMap, the right-click Summarize option very quickly creates a frequency listing of the chosen field:
Note that the count field shows the count of duplicate values. How can I access this using ArcPy?
Is it possible to access ArcGIS's table operations "Summarize…" and "Statistics…" in python? suggests using Summary Statistics, but I can’t get any meaningful output from this tool. Instead, it always just lists the total count of features, rather than the frequency of each individual value:
How can I achieve the result from the second screenshot above, using ArcPy in ArcMap 10.0 with an ArcEditor license (whereby I can’t run the FREQUENCY command)?
Dan Patterson’s script applies to ArcGIS 9.3 so (probably) isn’t useful?