Thank you I don't think it is frostbite because we are in southern ms and our winter was more rainy and not very cold at all.I think her beak looks normal. As long as the top and bottom beak align correctly, they should wear down and stay at the correct length. Some chickens just have longer or shorter beaks.
About the blackness of the comb, it could be a touch of frostbite from the winter, or little scabby spots where something hit the comb. The majority looks healthy though, and chicken's combs can heal themselves pretty well.