in mideieval city how do servants and apprentices fit into the eating schedule?

how was an average toilet system?

There is an op-ed essay on the history of toilets in today's LA Times. It seems today is World Toilet Day

http://www.latimes.com/news/opinion/la-oe-wertheim19-2008nov19,0,1443046.story

I assume medieval servants and apprentices ate when they were not servng others.