MINUTE (5 letters) DAY FRACTION is a term used to describe the amount of time that has passed in a day. It is measured by the number of hours and minutes that have elapsed since midnight. The two words that make up this term are HOUR (4 letters) and MINUTE (5 letters). An HOUR is a unit of time equal to 60 minutes, while a MINUTE is a unit of time equal to 60 seconds. Together, these two words represent the amount of time that has passed in a day.