Summary
Difficult conversations are usually better timed when clarity is stronger than the need to discharge pressure.
Timing Notes
Useful conversation timing does not remove discomfort. It can make the next honest sentence easier to find and help both people stay closer to the actual issue.
If a window looks tense, use it for preparation or repair rather than escalation. The better use may be writing notes, clarifying the ask, or waiting until the stakes are simpler.