Forever.
I have detested it for a while, but my dd(4) and ds (2) like some of the shows. Especially Peppa Pig.
Peppa Pig was on today whilst I was clearing away after breakfast etc and Grandpa Pig called the parrot a silly old bird.
A little while later my small sweet ds called me a silly old bird, so I said I'm sorry Nick Junior is broken now, (and that's not a very nice thing to say)