How often should you run is one of the most important questions to consider before you start any training.
There is no single right answer to this question. While considerations such as your goals, life schedule, and running experience can and should be used to establish boundaries of too much and too little running frequency for you, within these boundaries you can choose any of a number of different running frequencies based on personal preferences and needs and get the results you seek.
The most important piece of advice I can give you in this regard is that it is necessary to do some form of exercise almost every day to optimize your general health. Every man, woman, and child on earth, whether a competitive or recreational runner, whether a runner at all or a non-runner, should aim to exercise every day. The research is clear. If you exercise daily you will have lower risk of chronic disease, be leaner, and live longer than if you exercise just a few times a week.