Perfect Audience - Creating Lists Based On Recency
In this video, Kevin Davis from Social Traffic Lab talks about created retargeting or remarketing lists in Perfect Audience to target people who visited your site in the last 30, 60, or 90 days.
Once the audiences are setup, you would then target visitors, excluding lower periods. So to reengage visitors that haven't visited in the last 60 days or more, you would include "Visitors - Last 60 Days" but exclude "Visitors - Last 30 Days"