There are so many ways you can go about this. As long as you keep seeing results, then there is no need to change your routine. You can give 3 or more days rest between muscle groups if you need to. There are bodybuilders who train each muscle group once a week because that’s what works for them. Others train each group twice or three times each week. I don’t know much about your routine, diet, body weight and BF% to give you a more specific answer. If you have been lifting weights all of your life you must know by now which routine or frequency has worked best for you.
Bodybuilding works very different for everyone. Diet and rest are also 2 very important factors when doing bodybuilding, because without one or both of these parts it will be very difficult to reach your best possible shape. I’m not sure my answer has helped you, but my point is there is no one size fits all.
If you think your body needs more time between workouts in order to grow, then take the time to rest.