According to Genesis, Noah waited seven days before sending the dove out again from the Ark.
Genesis 8 describes Noah first sending a raven and then sending a dove to test whether the floodwaters had receded. The dove found no resting place and returned. Noah waited another seven days before sending it out again; on that second release, it returned with a freshly plucked olive leaf.
The passage then says Noah waited another seven days before sending the dove out once more. The bird did not return, suggesting that the land was becoming suitable for life outside the vessel. The repeated seven-day intervals form a clear rhythm in the narrative.
This timing is distinct from the forty days of rain and the 150 days during which the waters prevailed. It is also distinct from the question of what the dove carried back, since this question concerns the interval before its second release.