rrd graph for ntp monitoring does not reflect freq when neg (-) value.
Seems when frequency is negative (-) It is not graphed.
Thread here asking for confirmation
Which got 1 other person seeing same thing.
I had cleared rrd data since was not seeing neg values for offset, and freq was always 0.00, the reset of the rrd data cleared up the offset to show neg. But still not showing any value for freq.
If you look via ntpq you can see a value for frequency, as neg but rrd shows 0.00
Currently running 2.3.1_5
Have not checked to see if this is same for any other previous versions or i386 arch.