A term in the House of Commons is a maximum of five years, howeverit is standard practice to dissolve that House after four years. The main exception is if the governing party loses a vote in the House, at which point the Governor can either call on another party to form a government or dissolve the House and call an election. This is expected to happen soon because the even though the Liberals have more seats than any other party they control fewer than half of them so they require support from other parties to remain in power.
Next week I'll explain whey a missed field goal in Canada scores a single point.
That would be a vote on a bill or some such?
Thanks for the lesson. My knowledge of Canadian geography and civics is wanting. I must confess that your system seems odd. Is the reason to avoid having a divided government?