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Dbvisit Standby must be scheduled on both the primary (all primary RAC nodes) and standby servers. Since Dbvisit version 5.1.19 it is possible to schedule Dbvisit only on the primary server using the INITIATE_DBVISIT_ON_STANDBY variable. Ensure you understand the implication before using this feature. See variable INITIATE_DBVISIT_ON_STANDBY in the Dbvisit Standby configuration variables (DDC) section for more details.

Preferred scheduling method

Dbvisit Standby can be scheduled in Dbvserver (see Scheduling Dbvisit Standby with Dbvserver scheduler - all platforms). If Dbvisit Standby is scheduled with Dbvserver then no other scheduling software is required.
If Dbvserver is not running, then Dbvisit Standby can be scheduled in Windows Scheduled Tasks or other scheduling software. 
A decision must be made on the maximum time that the standby database may be behind the primary database. This is a business decision, but certain factors play a key role. These are:

1. Speed of the network
2. Activity on the database
3. Speed of the disks
4. Compression method chosen and CPU power to compress and uncompress archive log files.

A good recommended time frame is to schedule Dbvisit Standby every 10 minutes. 

Windows Scheduled Tasks

If Dbvserver is not running, then Dbvisit Standby can be scheduled in Windows Scheduled Tasks or other scheduling software. 

To schedule Dbvisit Standby using Windows Task Scheduler, add a Scheduled Task entry to the Oracle software owner on both the primary and standby server. This entry will run 24x7 and every 10 minutes. It is recommended that the standby server is scheduled a little later than the primary server. This ensures there are log files to be applied when Dbvisit Standby executes on the standby server.
To add Dbvisit Standby to Windows Scheduled Tasks (primary server):