African dwarf frogs - how often do they lay eggs?

[gary00010]

Hi all, we have five ADF - 4 male and 1 female. She recently laid a batch of eggs and we managed to hatch about 17, but unfortunately only survived about 2 weeks. (our first attempt).The other males are still all singing and grabbing hold of her, but are they wasting their time? Will she lay another batch or is it only once a year for example? Thanks for your help