The quiet in this case lasts for a full, taut dozen minutes, though I think anyone who sees it would be hard put to quantify its duration. Never mind that a large digital clock onstage is counting down the moments of an election night for an unspecified, troubled nation. It is safe to say that when Lesley Manville as Jocasta, Oedipus’s wife, seated and virtually immobile in a chair downstage left, is telling a story that her character has never told before, no one is watching the clock.