Autotasks frequency question

Hello Everyone,
I have a question please:
 Regarding 11g autotasks, as per the result of the following query, the optimizer stats collection ran once in each weekday window and 5 times in
weekends windows. I know I can control the duration and the time of each window but can I control the frequency of the job (for example make it run only 3 times in weekends) ?

Thanks

SELECT client_name, window_name, jobs_created, jobs_started, jobs_completed
FROM dba_autotask_client_history
WHERE client_name like '%stats%';
 2    3  
CLIENT_NAME                              WINDOW_NAME                                                       JOBS_CREATED JOBS_STARTED JOBS_COMPLETED
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