Nanny Job in Mississauga, Ontario

I am looking for a sitter for my daughters aged 10 and 7. I would like you to come to my home only during the school break times from approximately8am to 5pm.They attend a private school which does year round schooling and therefore they have a different schedule than regular schools. They have 1-2 week breaks every 2 months. The breaks are always as follows-last week of October, 2weeks at Christmas, one week in February , one week in April, the last two weeks of June and the month of August. The babysitter I am looking for would be during these break times and if possible, when they are sick.