This would be better formulated as "Check package statuses every (minutes)".

And please add a LONGDESCRIPTION saying "By default, check packages every 5 minutes. Increase this value to reduce load on managed nodes. Note that when any setting is changed for a host, package statuses will be checked immediately and this timer will be reset".

Also, it should have a default value of 5 minutes, to avoid changing existing installations, and to avoid users having to type it in *every time* they create a RPM package install directive.