Not sure. Some fights/raids he does it a lot and others not so much.
Fallen Protectors (10/16/13): 28 CS
http://worldoflogs.com/reports/rt-gs...7/?s=529&e=904
Iron Juggernaut (10/23/13): 18 CS
http://worldoflogs.com/reports/rt-l0...?s=2315&e=2590
General Nazgrim (10/23/13): 19 CS
http://worldoflogs.com/reports/rt-2t...?s=7766&e=8054
Thok (10/3/13): 27 CS
http://worldoflogs.com/reports/rt-1b...?s=3433&e=3948
Immerseus (10/16/13): 11 CS
http://worldoflogs.com/reports/rt-47...?s=1074&e=1446
Sha of Pride (10/23/23): 33 CS
http://worldoflogs.com/reports/rt-lt...5/?s=624&e=958
Fights like Malkorok where a healer isn't supposed to be in melee, for instance, aren't really going to have much CS use.
As far as FoL, after looking a bit more at some of the logs he uses it the most when he pops HA (which makes sense since you're trying to get the most HP building moves off during it's duration).