The default uudemon.hour shell script does the following:
Calls the uusched program to search the spool directories for work files (C.) that have not been processed. The script then schedules these files for transfer to a remote machine.
Calls the uuxqt daemon to search the spool directories for execute files (X.) that have been transferred to your computer and were not processed when they were transferred.
By default, uudemon.hour runs twice an hour. You might want uudemon.hour to run more often if you expect high failure rates of calls to remote machines.