Addressed mail and door drop data for both reach and frequency are available through your normal planning tool subscription packages: Telmar, Nielsen IMS and Kantar Choices. Not only will this provide reach and frequency by sector but also at audience level. The data also gives new insight into the commercial activities resulting from mail within each business sector and mail application.
All you need to do is speak to your provider; you will also need to sign a data agreement that we will send to you if you get in touch at firstname.lastname@example.org. This is all available free until 31st March 2019.