If you are using a rebuildable group as an audience for a scheduled email, the best option is to set the group to rebuild on send. This will insure that the email has the most up to date audience. For rebuildable groups with other purposes, follow the steps:
  1. Go to "Constituent360" > "Groups"
  2. Find and "Edit" the desired group
  3. On the group information tab, you will see the options daily, weekly, monthly, and yearly under Associated Query Information