gdk:monitor-refresh-rate (object)

object -- a gdk:monitor object
refresh-rate -- an integer for the refresh rate in milli-Hertz, or 0

The accessor for the refresh-rate slot of the gdk:monitor class returns the refresh rate of the monitor, if available. The value is in milli-Hertz, so a refresh rate of 60 Hz is returned as 60000.

Since 3.22