Once before, in 2002.
Slovenia has won the world cup once.
Slovenia will be in their second World Cup in 2010.
Once before in 2002.
They have never won it.
This will be their 2nd.
Slovenia has never won the World Cup.
2010 will be their second appearance.
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Slovenia has only ever qualified for the World Cup finals once, in 2002, where they failed to progress beyond the group stages.
Brazil have entered the world cup 18 times! This was answered is 2010!
I believe the US has played in the World Cup 10 times.