Mrs. Turner is prescribed insulin aspart, 16 units, SC TID at mealtimes. When Mrs. Turner returns home, the provider would like to switch her meal-time insulin administration to a pen delivery device instead of insulin syringes. The provider will keep the same dose. Assume that Mrs. Turner eats three meals a day. If the pen cartridges contain 3 mL of U-100 insulin aspart, how often will Doris need to replace the cartridge?