The concept of time travel is a fascinating topic often explored in science fiction, but there is no scientific evidence or established theory that suggests time travel is possible. Therefore, it is difficult to determine how often one could hypothetically go back in time if time travel were achievable.
If time travel were possible, it would depend on the specific mechanism or rules governing it. Different theories and fictional accounts propose various scenarios, such as traveling to specific points in the past or being able to freely move back and forth in time. The frequency of time travel would depend on the limitations and constraints imposed by such mechanisms.
It is important to note that time travel, as currently understood, is primarily a concept of science fiction and speculative thought experiments rather than a scientifically validated concept. The understanding of time and its relationship with causality and the laws of physics is still an active area of research and study.