If she has her the majority of the time then ask for as much time as you can when you are free to have her, i.e. weekends, days off etc.. Example I have my S all the time, my wife gets to be with him on the weekends (she works 8-5 M-F) I will even allow her to take him after she gets off work if I do not have anything planned with him.
“Do you want to be RIGHT or want to be LOVED” “You have to have a life to share a life with someone” “When you stop resisting, you start learning”