at a stretch

at a stretch (not comparable)

1. (chiefly Britain) In one continuous period of time; at a time.
   • 2012, Christoper Zara, Tortured Artists: From Picasso and Monroe to Warhol and Winehouse, the Twisted Secrets of the World's Most Creative Minds, part 1, chapter 1, 26:

     Clara's father, a trollish ne'er-do-well who spent most of his time in brothels and saloons, would disappear for days and weeks at a stretch, leaving Clara and her mother to fend for themselves.

   He worked for fifteen hours at a stretch.

• statechart