from cognite.client.data_classes import TransformationScheduleWrite
schedules = [TransformationScheduleWrite(id = 1, interval = "0 * * * *"), TransformationScheduleWrite(external_id="transformation2", interval = "5 * * * *"))]
res = client.transformations.schedules.create(schedules)

{
  "items": [
    {
      "id": 123,
      "externalId": "<string>",
      "createdTime": 123,
      "lastUpdatedTime": 123,
      "interval": "0 0 * * *",
      "isPaused": true
    }
  ]
}