Final answer:
The pulse should be counted for 1 minute because it provides a more accurate representation of the heart's rhythm.
Step-by-step explanation:
When counting the pulse, it should be counted for 1 minute because 1 minute provides a more accurate representation of the heart's rhythm. Counting for shorter periods of time, such as 30 seconds, may not capture any irregularities in the heart's rhythm that may occur over a longer period.