I work 6 days a week. I will often rinse my hair or co-wash 5 days and wash it only 1. any more shampoo than that is drying to the hair. I am currently putting a little conditioner in my hair under my noodlehead curl cream, I want to use it up. I will be moving on to either Giovanni Direct, Khiels Leave IN or NTM Leave In. I have used samples of them all and they are pretty good for the winter for me.
If you need to wash with shampoo more than 1 time a week, you can always prepoo your hair. Leave the prepoo in, place your hair in 4 big loose plaits and target your scalp only with the shampoo. Hopefully by leaving the prepoo on your hair it will keep your hair from drying out while allowing you to clean your scalp.