Find the right frequency for refreshing the each dataset

[rjsparks]

At #277, @ajeanmahoney requests that the RFC dataset be updated at least once every 12 hours. I'm wondering if the community will want the updates to appear even more rapidly, and suggest we look at the cost of an update once per hour.

We should tune this for all the datatasets.

Is there a quick link to point to what the current configuration is?