snip "once a week should be enough, especially if you gutload them."endsnip

Gutloading insects is usually not as simple as most people make it out to be and if not done properly under controlled conditions is insufficient to properly supply correct nutrients to the frog..
At this time, all of the studies done on commonly used feeder insects show that gut loading unless done under very controlled conditions is usually insufficient to meet the needs of the consuming reptile/amphibian.

For a start see the following articles and associated articles in the appropriate bibliographies..

Sabatini, Jeremy A.; Dierenfeld, Ellen S.; Fitzpatrick, Marianne P.; Hashim, Laurette; 1998, Effects of internal and external supplementation on the nutrient content of crickets, the Vivarium 9(4): 23-24

Hunt, Amy S.; Ward, Ann M.; Ferguson, Gary, 2001, Effects of a high calcium diet on gut loading in various ages of crickets (Acheta domestica) and mealworms (Tenebrio molitor), pp. 94-102 edited by M. S. Edwards, K.J. Lisi, M. L. Schlegel, R. E. Bray, In Proceedings of the American Zoo and Aquarium Association Fourth Conference on Zoo and Wildlife Nutrition

Crissey, Susan D.; Ward, Ann M.; Maslanka, Mike T. 2001, Nutrient content of nutritional supplements available for use in captive lizard feeding programs, pp. 53-59 edited by M. S. Edwards, K.J. Lisi, M. L. Schlegel, R. E. Bray, In Proceedings of the American Zoo and Aquarium Association Fourth Conference on Zoo and Wildlife Nutrition

Wright, Kevin M.; 2001, Diets for captive amphibians, pp. 63-71, edited by K. M. Wright and B. R. Whitaker, In Amphibian Medicine and Captive Husbandry, Krieger Publishing Co., Malabar

Ed