After you have created your Email campaign you can schedule your survey to be sent later or set it up as a recurring campaign.
After choosing the Schedule to launch later option you will move forward to either schedule the sending of the Email survey or setting up the recurring campaign.
If you choose to schedule just set the date and time and then move forward to Confirmation. When you have made sure all you settings are ok move to Launch. Your survey will then be sent at the time you scheduled.
If you choose to set up a Recurring campaign choose the recurring campaign option and choose between a monthly or a weekly campaign.
In the weekly campaign choose the day of the week you wish the survey to be sent and set the time.
In the monthly campaign choose the day of the month and the time.
After this you can move to Confirmation and when everything is set go to the Launch page - after this your survey will be sent recurring accordingly to the setup.