To change notifications’ frequency, go to Smart Alerts.
On the alert row you want to change the frequency for, click on the edit icon.
A pop up similar with the one below will appear.
Within the Frequency section, click on the drop-down arrow and select the new frequency for your alert.
You can delete an existing email address by simply clicking on the "x" near the email address. You can add up to 5 new email addresses.
Once you're done with all the changes, click on Save.