Arturo, every growth node has three starts in it. Even if a node begins to grow and then is frozen and dies there are still two other starts there to take its place. You would still get new growth and bloom after a freeze loss. Every spring I go through several freeze and thaws and my roses still grow and bloom.
We actually don't NEED to prune the rose. We do it for ourselves not the rose. It keeps the rose in the size and shape we like but the rose will grow and bloom just fine without it. There are thousands of roses around the world that no one tends or ever prunes that have been growing and blooming for many decades all by themselves. Timing the pruning is for our benefit and not the roses. Exhibitors will tell you all about watching and charting how long a rose takes to cycle so they can prune a rose to have blooms at just the right time for a show. I know from experience that even if I prune in February, with my weather, I still won't get my first bloom until around June 1st. Regardless of when I prune or the roses cycle or how many freeze and thaws it goes through my roses bloom in June.
