DDs are 4.5y and 18m.
Weekdays, we allow 7.20-7.35am ish (ie two Blueys on CBeebies) - by this time both DDs are dressed, hair done, teeth brushed and i use the time to do my hair, teeth, make up in the bathroom.
DD1 occasionally might get 20-30mins of something between 4-5.30pm whilst DD2 is still at nursery. But she doesnt tend to ask for it and i only offer it if I think she is really tired and just needs to sit and chill for a bit. Its probably only once a week? This week shes not had any at all after school.
Then again from 6.30-6.45 ish in the evenings. Maybe a couple of Hey Duggies or something on iplayer. Usually this is after everyone is in pjs, having some milk. When the tv goes off, we do teeth, story (1 or 2) and then bed.
On a weekend, im more relaxed. We might watch a Julia Donaldson adaptation or a Disney 30mins something.
I tried to avoid DD2 watching too much tv, but she definitely gets more via osmosis when DD1 is watching, than DD1 ever did at the same age.
DH and I on the other hand put the tv on after the DC are in bed and weve eaten at around 8pm and it stays on until we go to bed.