Got a few Jobs, in several databases in the form:

DECLARE
  X NUMBER;
BEGIN
  SYS.DBMS_JOB.SUBMIT
  ( job       => X 
   ,what      => 'begin JOB1; end;'
   ,next_date => to_date('09/12/2014 20:18:14','dd/mm/yyyy hh24:mi:ss')
   ,interval  => 'SYSDATE + 1/96'
   ,no_parse  => FALSE
  );
  SYS.DBMS_OUTPUT.PUT_LINE('Job Number is: ' || to_char(x));
COMMIT;
END;
/

I wrote a program to set them to broken and create a scheduler job.
I know I can use the same sql interval (ie.: 'SYSDATE + 1/96'), but I want to know if there is a way to program it so that the interval is set using the calendar option.

So the following conversion will take place:

sql interval ==> calendar interval
SYSDATE + 1/96 ==> FREQUENCY=MINUTELY, INTERVAL=15
TRUNC(SYSDATE + 1) + (3/24) ==> FREQUENCY=DAILY,BYHOUR=3,BYMINUTE=0
trunc(SYSDATE+1/24,'HH') ==> FREQUENCY=HOURLY,INTERVAL=1


Thanks

Update.
Here is the PL/SQL I wrote

DECLARE
    vJobNumber          user_jobs.job%type;
    vInterval           user_jobs.interval%type;
    vNextDate           TIMESTAMP;
    vSchedulerJobCount  PLS_INTEGER;
BEGIN
    vSkip := FALSE;
    BEGIN
        SELECT job, CAST (next_date AS TIMESTAMP WITH TIME ZONE), interval
          INTO vJobNumber, vNextDate, vInterval
          FROM user_jobs
         WHERE UPPER (what) LIKE '%JOBX%';

        DBMS_JOB.BROKEN (vJobNumber, TRUE);
        COMMIT;
    EXCEPTION
        WHEN OTHERS THEN
            DBMS_OUTPUT.PUT_LINE ('Could not find an active dbms_job called JOBX');
            vSkip := TRUE;
    END;
--
    IF NOT vSkip THEN
        SELECT COUNT (*)
          INTO vSchedulerJobCount
          FROM user_scheduler_jobs
         WHERE job_name = 'JOBX_JOB';
        IF vSchedulerJobCount = 0 THEN
            DBMS_SCHEDULER.create_job (job_name => 'JOBX_JOB'
                                      ,job_type => 'STORED_PROCEDURE'
                                      ,job_action => 'JOBX'
                                      ,start_date => vNextDate
                                      ,repeat_interval => vInterval
                                      ,enabled => TRUE);
            DBMS_OUTPUT.put_line ('Scheduler Job JOBX_JOB was created');
        ELSE
            DBMS_OUTPUT.put_line ('Scheduler Job JOBX_JOB already exist!');
        END IF;
    END IF;
END;
/

So my question basically is, is there a way to program in PL/SQL a conversion from sql interval (SYSDATE + 1/96) to calendar interval (FREQUENCY=MINUTELY, INTERVAL=15)?