It turns out that the time to get from one well to the other, which I won't be able to prove to you because it requires time-dependent quantum mechanics, and we're talking about time-independent quantum mechanics, but let me just tell you that the answer is, if you know the energy difference between the blue and the red, that the rate of getting across is 5*10^-14 seconds, divided by whatever that energy is, expressed in kilocalories/mole. 