Both my dad and partner have done it twice, each time for less than two weeks. I think the jurors in this cause were further excused because of the sheer length of the trial, rather than because the evidence they had to consider was particularly gruesome. Obviously a premature baby serial killer is gruesome, but I think jurors are usually excused from serving again if the trial has been so horrific that they’re offered counselling or something. It’s very very rare for a trial to take more than 6 weeks.