how long after the 1st egg can i expect the 2nd one?

Each hen can lay an egg every 25 hrs. Don't expect that when they first start laying.
My 2 red sexlinks started laying Saturday befor last. Each has layed an egg a day since. One of my rir's or black sexlink has layed 2 eggs since a week ago sunday. another has layed 2 large double yokers

 

My 16wk leghorn pullet laid her first egg at 16wk 3d, and laid an egg 15 days in a row. Today is day 16, and we didn't get an egg. How disappointing to only see golf balls in the nest box today, but I was surprised at how many days in a row she laid.

 

My orpington hen laid her first eggs for 3 days in a row then took a day off, now 2 days in a row and counting.