“…A study that analyzed time usage in mothers of infants who responded to the ‘time use survey’ in 2009 showed that sleep was the largest occupational area, followed by work, leisure, infant care, and activities of daily living (ADLs) ( Hong & Kim, 2014 ). A study that analyzed the time usage according to occupational area in disabled adolescents based on the ‘time use survey’ showed that the time usage for rest and sleep was the highest, followed by ADLs, education, leisure, social participation, and entertainment ( Bak & Cha, 2020 ). A study that analyzed time usage in disabled elderly based on the ‘time use survey’ in 2014 classified the occupational areas into sleep activities, daily activities, work activities, and leisure activities, and the disabled elderly showed the highest time usage for sleep activities, followed by leisure activities ( Bak & Kim, 2020 ).…”