So probability estimate. I'll do it in the next column. So probability, probability estimate. And once again, we can do that by looking at the relative frequency. The relative frequency of zero, well, we observe that 24 times out of 50, and so 24 out of 50 is the same thing as 0.48, or you could even say that this is 48%. Now, what's the relative frequency of seeing one person in line? Well, you observe that 18 out of the 50 visits, 18 out of the 50 visits, that would be a relative frequency, 18 divided by 50 is 0.36, which is 36% of your visits.