"How much do you fly" is really a loaded question.
"Hours" is what many people chase when it comes to finding the next job.
"Sorties" is a pretty good measure too. Better than hours when it comes to how much time you spend "preparing, flying and debriefing"... though you may have fewer "hours".
In U-2 land (to include the T-38), you will fly about 2 times per week when not deployed,... more if you are aggressive on picking up sorties.