Tink,
Go ahead and divide. I did not see anything that looked like frog eggs in your pics. Assume there are frog eggs. do you ever eat hen's eggs? If so, dumping frog eggs on the ground has no more effect on global ecology than eating hen's eggs. Quit worrying about inconsequential stuff like frog's eggs and concentrate on stuff that is really important. Frogs will be here long after humans are gone. If you want some bullfrog eggs, email me.
BTW, your pics look more like Toad eggs.