downsampling an external signal

[Matt80]

in the digilent shop, the 1808X is recommended as successor of the DT9836. With the DT9836 it was possible to use CounterTimerSubsystems for downsampling an external signal

for example:
Device device = DeviceMgr.Get().GetDevice(DEVICENAME);
CounterTimerSubsystem subsystem = device.CounterTimerSubsystem(0);
subsystem.Clock.ExtClockDivider = 100; // divider
subsystem.Clock.Source = ClockSource.External;
subsystem.DataFlow = DataFlow.Continuous;
subsystem.CounterMode = CounterMode.RateGenerator;
subsystem.GateType = GateType.None;
subsystem.Config();

subsystem.Start();
...
subsystem.Stop();

what would be the way to do it with the USB-1808X?