In all Oerba Areas are minigame rift. Clock puzzles are guaranteed to return. There are also other places where those puzzles pop up, but I can't remember them.
Now, Clock Puzzles aren' THAT bad, if the numbers are fixed. You make a few tries, notice what moves where bad and find the solution thanks to the magic of trial and error. And then there are clock puzzles, that switch their numbers with every restart. Have fun.
For clock puzzles that change every time you restart (and for any really), just pause immediately they start, write down the puzzle on paper, solve it on paper (not too hard), then unpause and apply your solution. I did all the puzzles this way and didn't really have much trouble with any of them.