@pawanswami 

You can set the schedule in the DAB for the task and start the pipeline on Wednesday. You can set the periodic trigger configured below (interval 2 unit WEEKS) to achieve the biweekly scheduling. You can try to un pause the job on a Wednesday and it will run every 2 weeks on Wednesdays from that point forward. You can also achieve it in a notebook to manage the scheduling.

resources:
  jobs:
    jobs_t:
      name: job_t
      trigger:
        pause_status: PAUSED
        periodic:
          interval: 2
          unit: WEEKS
      tasks:
        - task_key: run_notebook
          notebook_task:
            notebook_path: /Users/biweekly_wednesday
            source: WORKSPACE