As an EMT – Basic, I got exactly 3 days FTO time. After that I was placed with an EMT that was more senior than I, but that was more for getting me pointers as to what to do as opposed to formal training. In short, I was placed with someone senior who could watch over me sort of as a mentor. That arrangement worked out fairly well even though we did not have a formal FTO training time beyond that 3 days.
Depending upon where I work as a paramedic, my FTO time was either zero days or as many as 30 days. The one place that I work that had a thirty day orientation/FTO time was also well known for not having any new full-time paramedics pass their FTO time. There were some significant politics involved around the part-time employees. Most of the recent for the shorter (zero) FTO time that I had for two of the companies I worked for was the fact that I was already fully accredited for the county that I was going to be working in. They figured as long as I was with a partner that newer things were, and that I could read a map, I was good to go. And in truth, I really was. I would have enjoyed more time to season as a paramedic before I moved on to other ventures, but that is how life is.