Rate

A rate answers how many per unit of something else, so unlike a proportion its numerator need not be part of its denominator and its value can exceed 1. For example, 84 emergency room visits in a town of 12,000 people over one year is $84 / 12000 = 0.007$ visits per person per year, normally reported as 7 visits per 1,000 people per year. Speed works the same way: 60 miles per hour is a rate, and no proportion could ever equal 60. Always state the base and the time window, because 7 per 1,000 per year and 7 per 1,000 per decade are very different claims.