How do i Cast to Google Display every other Wednesday?

Configuration
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Hi I’ve created an automation to cast an image to Google Nest hub that runs every Wednesday at 16:00 but how do I change this to run every other Wednesday, not every Wednesday? Thanks.

alias: Cast Downstairs Bin Green
description: “”
trigger:

  • platform: time
    at: “16:00:00”
    condition:
  • condition: time
    after: “15:00:00”
    before: “19:00:00”
    weekday:
    • wed
      action:
  • service: media_player.play_media
    target:
    entity_id: media_player.downstairs_display
    data:
    media_content_id: media-source://media_source/local/bins-green.png
    media_content_type: image/png
    metadata:
    title: bins-green.png
    thumbnail: null
    media_class: image
    children_media_class: null
    navigateIds:
    - {}
    - media_content_type: app
    media_content_id: media-source://media_source
    mode: single
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