I have had ~1000 landings. Up until last month, one aborted landing. Very smooth, most didn't even notice until the captain said something. A couple of weeks ago, we were not very far off the runway at all and we pulled out of it. We went into a seriously high angle of attack and I was mildly worried about stalling. The captain explained that the winds had shifted and the airport had been reconfigured for a different runway.

Then, just last Friday, on a very rough ride (very high winds) into CVG we pulled out. Again, this was pretty dramatic and everyone knew that we had aborted. The captain explained that someone was on our runway. Honestly, I am not sure if I believe him. I think we were way above the glide scope as I wasn't sure we could have got down had we wanted to. When we did land, it was pretty interesting. So, 1 in 8+ years and 2 in 1 month.