Checkbox label: "Refresh automatically" vs "Automatically refresh"

I have a web page with a checkbox on it. The checkbox controls whether the list shown on the page is refreshed automatically: if checked, the list is refreshed every second; if unchecked, the list does not refresh.

I was wondering how best to label this checkbox.

Refresh automatically

vs

Automatically refresh

Either form is valid English, but I'm wondering whether the first is more idiomatic for buttons/checkboxes as it has the verb first. A quick straw poll in the office also showed a slight preference for this form.

I also toyed with

Refresh every second

but the problem with that is that the refresh period may change.

So, my question: should checkboxes generally be labelled verb-adverb or adverb-verb?