That is a realy long time, never kept them for those amounts of time in the rainchambre.
Which species was it that took so long to lay off their eggs?
And did they amplex for the complete extend of time?

Mostly i put my frogs in when i think they are ready for it,
they've been somewhat wetter then usual then but not as wet as in the rainchambre.
I noticed that if they are in amplexus they will lay eggs within a week or not at all,
but that is my experience, never kept them in for longer then 2-3 weeks.
They also tend to develop some irritated/damaged skin when i keep them in the rainchambre for extended periods of time.