When looking for an "expert" rhinoplasty surgeon, it is more than just the number of surgeries they perform. However, experience does matter and the surgeon's volume can speak to that. In general, I think that if a surgeon performs in excess of 100 rhinoplasty / septorhinoplasty surgeries a year, they would have the requisite experience to get nice results. Also seek out people who have good experience in revision rhinoplasty.
Rhinoplasty is indisputably the most difficult...