How many times does the digit 9 occur between 100 and 1000?

The digit 9 occurs 271 times between 100 and 1000. It appears in three places: the hundreds, the tens, and the units. In the hundreds place, 9 only appears in the numbers from 900 to 999, contributing 100 occurrences. In the tens and units places, each contributes 90 occurrences (from 190-199 and 90 numbers in the units place across each hundred), resulting in a total of 271 appearances of the digit 9.