The rotation by time would be the following: in rounds one, two, three, and four, in the order Conservative, Liberal, NDP, Liberal, it would be six, six, six, six. In round two, in the order Liberal, Conservative, Liberal, Conservative, NDP, it would be six, six, six, five, three. This would total 50 minutes, which I believe is representative of the proportion in the House as well.
On February 4th, 2016. See this statement in context.