Lot's of banter on this thread! Been away for a while and without wishing to drift.....
a considerable (vast majority for JSF) of time will be based on land.
BPLT,
I think you will find that with cats and traps the JSF will spend a whole load of time at sea. And if one CVF is deployed there will be cries for the other one to be brought forward for training, either that or the JSF guys will join a US CV for training. You will not generate a high sortie rate by just bouncing on and off occasionally.