Absenteeism n. : The state or practice of an absentee; esp. the practice of absenting one's self from the country or district where one's estate is situated.

Example:
How to calculate a company's Absenteeism rate for the year?

Taxonomy
absenteeism, absences, employees, workers, excessive absenteeism, illness, society, causes of absenteeism, productivity, Attacking Absenteeism, Small Business, jobs, sick days, social costs, indirect costs, absence from work, duty, employee absences.

Defination from the web:
absenteeism n. Habitual failure to appear, especially for work or other regular duty. The rate of occurrence of habitual absence from work or ... Absenteeism is the term generally used to refer to unscheduled employee absences from the workplace. ...