I read an article a few years ago about Martin-Baker and about how they kept track of how many times people had ejected in their seats. I remember that they had a small number that had ejected 4 times and a handful, maybe two or three, that had ejected 5 times. I think one guy may have had six ejections. I could not find it on google but I think the article was in Air and Space magazine.
P.S. One of my ECMO classmates in the RAG ejected with just 8.9 hours in the Prowler. Another one of my classmates ejected after having the same problem with the jet. 2 out of 5 guys so far.......