Time-use research is an interdisciplinary field of study dedicated to learning how people allocate their time during an average day.
Time-use research investigates human activity inside and outside the paid economy.
Time-use research is a social science interested in human behavioural patterns and seeks to build a body of knowledge to benefit a wide array of disciplines interested in how people use their time.
He or she may also view the commute as part of his destination activity to which he has gladly committed his or her free time.
The distinction between primary and secondary time is a way to include activities when multitasking.
Activities that take place at the same time are separated into primary and secondary categories based on priority assigned to each, with the activity with the highest priority considered to be the primary.
When drinking coffee while working, drinking coffee would be the secondary activity and would be considered necessary time even though the primary activity, working, would be classified as contracted time.
It is also important to note that including secondary time may make it appear that a person spends more than 24 hours a day on activities due to the overlapping nature primary and secondary time.