I know this sounds strange but i think at least one of my girls is laying twice a day.
I have four girls in together, and I thought the one I put in with m y old male was a girl too, but there have been no eggs in there as yet.
My bigger run with the four girls has small animal bedding (shredded shavings) so it can be difficult to find eggs in it, and they lay them anywhere, not in a nest as such
So some days I find none, or just one or two eggs, and other days I find 8 or so.
So either they are laying erratically or they are excellent at hiding them. I am pretty thorough though, so I'd be surprised at that
Makes life very interesting and fun