The odds of turning two 5-4-3 triple plays in the same game have to be insanely low so I tried figuring it out the best I could. There have been 740 recorded triple plays since 1876, only 95 of which were 5-4-3. I've seen different numbers as far as games played since 1876 so for fun will just go with a rough estimate of 220,000.
So based on history, the chances of a 5-4-3 triple play occurring is 95 divided by 220,000. That comes to 0.043%. The chances of it happening twice in a game using that number is 0.000018% or about 1 in 5.55 million. So should only happen once every 5 1/2 million games played.
Edit: I realized afterwards that I should have used 94 as the number instead of 95 as it's actually only happened in 94 games, but whatever. Close enough.