Nothing out of the ordinary.
First off, prorogation is a normal part of the parliamentary process. That’s how one session of Parliament (or a provincial legislature) is ended. When Parliament is recalled after prorogation, there’s a new Speech from the Throne, a new budget, a new agenda of business. There’s nothing sinister about prorogation.
Harper was Prime Minister for three Parliaments, following the general elections of 2006, 2008, and 2011. He had minority governments for the first two Parliaments, and a majority from 2011 to 2015.
The 39th Parliament (2006 to 2008), had two sessions. The first lasted from April 3, 2006 to September 14, 2007. It was then prorogued, and the second session called for October 16, 2007, a gap of just over a month. That session lasted until Parliament was dissolved on September 7, 2008, for a general election. So, one month of prorogation over the course of over two years.
The 40th Parliament (2008 to 2011) had three sessions: from November 18, 2008 to December 4, 2008; from January 26, 2009 to December 30, 2009; and from March 3, 2010 to March 26, 2011, when Parliament was dissolved for the 2011 election. So, two prorogations, of about six weeks and then two months, roughly, over the course of two and a half years.
The 41st Parliament (2011 to 2015) had two sessions: June 2, 2011 to September 13, 2013, and then October 16 to August 2, 2015, when Parliament was dissolved for the 2015 election. One prorogation, of just over a month, over the course of four years.
Now, if you look at the 38th Parliament (2004 to 2005 - Prime Minister Martin) and the current 42nd Parliament (2015 to present - Prime Minister Trudeau), you’ll see that neither was prorogued. But that doesn’t mean the Parliament was sitting all that time. In addition to prorogation, which formally ends the session, Parliament can simply adjourn itself. Technically, it’s in session when in adjournment, but no business is conducted. If you look at the profiles for the 38th and 42nd Parliaments, you’ll see that there were lengthy periods of recess, typically 45 days over the Christmas period, 90 days over the summer, and other recesses at different times of the year.
Why the difference? Different practices of different PMs and parties. Some like the flexibility of always being in session, albeit with lengthy periods of recess; others like the formal ending of one session and starting a new session. And in Martin’s case, he lost a vote of confidence after just one year, triggering the 2006 election, so we don’t know if he would have prorogued at any point. But in either case, prorogation or adjournment, the sittings of the Parliament are in the control of the government.
What you may be thinking of was the prorogation from December 4, 2008 to January 26, 2009. The three opposition parties announced that they might work together to vote non-confidence in the government and try to form a coalition. Prime Minister Harper’s response was to prorogue over Christmas and start a new session in January. Sure, that was a political move, to buy time; but, he appears to have correctly concluded that the proposed coalition would fall apart, which it did, and when the Parliament started its session in January, there was no motion of non-confidence. Political breathing space, yes, but Parliament met, as usual, after the Christmas break.
Curiously, you don’t seem to be mentioning the time Prime Minister Harper took a lot of flak for calling an election, which seems germane to this thread. In 2008, he concluded that the minority Parliament was simply not working, and so he called a general election after only two and a half years. He took heat for it, because his government had passed a fixed election date law, and some saw this as contrary to that law. His response was that while fixed elections are a good thing, in a parliamentary system there are also times when a Parliament is not working well, so you have an election and let the people decide. Apparently that was undemocratic in the eyes of some, and he got sued. The courts agreed with the Prime Minister that the presumption of fixed election dates didn’t prevent a dissolution of a minority Parliament.
I’m not aware of an ancient king who only held office by winning three elections, and promptly resigned on losing a fourth election, but perhaps you could provide examples?