In a 12-hour period of time how many more minutes is at least one 1 displayed than at least on 9?

In a 12-hour period, the digit '1' appears in the hour and minute places. The hours from 1 to 12 include '1' in 1:00 to 1:59 and 10:00 to 10:59, totaling 120 minutes. The digit '9' appears in the hours 9:00 to 9:59, totaling 60 minutes. Thus, '1' is displayed 60 more minutes than '9' during this period.