A fair coin is flipped 20,000 times and heads comes up close to half the time. That result illustrates that probability is the long-term:

1. A handful of flips can wander far from a half. 2. As repetitions grow the proportion settles down. 3. Probability is the long-term relative frequency of the outcome. _Source: OpenStax Introductory Statistics 2e, Chapter 3, Probability Topics._