Frogs don't sit on their eggs. Their eggs (frogspawn) are laid in bulk and they float in the water and hatch by themselves. The young frogs emerge as tadpoles. Between three and six weeks later they start growing legs and their tails disappear, and they gradually become frogs.
3 to 4 weeks
About five months.
Frogs that spawn in water appear to sit on their nest while they are laying their eggs. Frogs that spawn in damp leaf litter may sit on the clutch to protect them.
10000 hours
About 4 weeks
for 21 or 22 days.
Frog eggs. Frogs lay eggs, and the eggs hatch into tadpoles. Then the tadpoles turn into frogs.
1 day
Frogs lay a lot of eggs because a lot of animals eat tadpoles and small frogs including other frogs.
The oviduct.
Most frogs extensively care for their eggs and young.
It doesn't stay with it's mother. A "baby frog" is not a frog at all. Female frogs lay eggs that are later fertilized by male frogs. These eggs then "hatch" into tadpoles - the sexually-immature stage of frogs. The mother frogs will rarely meet their offspring.