The other four occasions were 1954 (Vancouver, Empire Games), 1976 (Montreal, Olympics), 1978 (Edmonton, Commonwealths) and 1994 (Victoria, British Columbia, Commonwealths).
"I think it's really good news, and particularly to see South Africa entering the race," New Zealand Olympic Committee chief executive Keryn Smith said yesterday.
"They are contemplating an Olympic bid, and this 2022 bid is really a precursor to that. I think it's really healthy.
"I don't know if there's been two bids on the table so early before, and it shows a real sense of optimism about the future of the Commonwealth Games."
Smith said that while there had been whisperings that the South Africans were preparing a bid, the Canadian entry was a surprise.
South Africa hosted the rugby World Cup of 1995 and football's World Cup in 2010, proof it has enlarged its ambitions on the international sports stage.
"Clearly they have the infrastructure and capability to run those events and are now looking to maximise that," Smith said.
The NZOC will talk to both bidding cities' representatives at a CGF meeting over a couple of days before the Games begin in Scotland on July 23.