Hi there!

Unfortunately, Kibana does not support visualizing over array types. Instead Kibana expects that each document represents an event in time, and then visualizes those events over time. To accomplish what you're attempting to do you would need to create a new document for each event and then graph those documents over time.

For example, create two separate documents:
```
PUT /my-events/_doc
{
  "date": "2019-03-20T18:30:00",
  "event-type": "SOME_TYPE"
}

PUT /my-events/_doc
{
  "date": "2019-02-07T18:00:00",
  "event-type": "ANOTHER_TYPE"
}
```

Once you've indexed these documents you can the create an index pattern in Kibana and set the timestamp field to your `date` field and use that in your graphs as your X-Axis.

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