I couldn't really say how often they were until my now wife woke up to one and I woke up in the hospital. I kept waking up feeling like a train ran over me for a while before that, back pain bitten tongue.
Mayo found a small encephalocele on my right temporal lobe during my extended eeg stay and a after a syscom test. They operated the beginning of February with a laser ablation to cut it off. I have had a couple of incidents but not unexpected since I just had brain surgery. Since then I've had less breakthrough-seizures as recovery goes on. I have some followup appointments coming and more imaging to come.