The dashboard abbreviates "minutes" with "ms", but to me that reads "milliseconds". I think it should probably use "min".
That being said. Maybe that can be a more detailed popup as well. Avg response, mean, median, min/max.
The time ranges use "ms", but the actual timestamps indicate the gap is minutes.
The time on the bottom left is how long ago the oldest status is, while the one on the right is how long ago the latest status is from.