Office work can lend itself to alternative or flexible working arrangements, such as part-time work or telecommuting—especially if the job requires extensive computer use. About 19 percent of secretaries work part time and many others work in temporary positions. A few participate in job-sharing arrangements, in which two people divide responsibility for a single job. The majority of secretaries and administrative assistants, however, are full-time employees who work a standard 40-hour week.
Source: Bureau of Labor
Statistics, U.S. Department of Labor, Occupational Outlook
Handbook, 2006-07 Edition