A very rough estimate for commercial flights is something between 1 in 100 and 1 in 1,000 from a stabilised final approach to the runway. It is variable mainly by weather encountered, and also by location.
London Heathrow airport averages one a day. Sometimes none for a week, sometimes several in a day.
It is almost always unconnected with the airline; any carrier would normally have done the same thing from the same point in their approach.
I don't know why some get so worked up about them.