In fact, our current electoral system already produces elections too frequently! We have had 22 federal elections since 1945, which is well above the average in many other democracies with a proportional representation system.
Source : Broadbent Institute
On the contrary, proportional representation is conducive to coalition governments that tend to be more stable. Since obtaining an absolute majority is very difficult, the parties are more inclined to ally in order to govern together instead of governing against each other. This allows a greater proportion of electors to be taken into account within government. A coalition government allows for more stable, more inclusive and less polarized governments in terms of political ideologies, without necessarily generating repeated elections.