The LGGG feed shows that 134.325 and 125.200 are heard but I guess some others can be heard also.
I just checked some archives from today, 1500-1600 UTC, in addition to the other frequencies you can hear through cross-coupling, it does appear there is at least a 3rd frequency on the radio ? You could hear 3 different controllers during this time working 3 distinct areas.
Sounded like one controller was working Kirkira + Kefallinia + Paleochora sectors (on 134.325, 124.625, + ??), another was working Milos + Sitia sectors (on 125.200), and the 3rd controller was working Rodos + Kavos sectors (on 133.325, + ??). (see chart below - you need to be logged onto the forum).
So the 3rd frequency could be 133.325 or another one linked with it ?
From what I've heard on the overnight shift they split the airspace into 2 areas with Milos and Sitia combined with Rodos and Kavos, they also seem to use this configuration during the day when it's slow. When it gets busy the sectors must get further split up laterally and vertically, although so far I've never heard them split off the airspace vertically above FL330. Maybe a winter thing when it gets real busy with the holiday traffic ?
To further complicate things they seem to use multiple or backup frequencies on a regular basis, in addition to 134.325 in the kirkia sector I've also heard them use 127.725 and 133.725.
It would be helpful to know exactly what frequencies are actually on the radio ?