To set up an email notification
Email Notifications are used in Workflow Rules, Blueprint, Approval Process, etc. Zoho CRM provides graphs that show the daily or weekly usage statistics of notification across various features. You can view the usage from Go to Setup > Automation > Actions >EmailNotifications.
The MoreInfo link provides detailed information on the usage stats. Please note that the graph will cover the usage stats for the past 7 days.
Data is displayed based on modules, workflow rules and is categorized by date.
Email Notifications' usage statistics can also be filtered based on its usage in Workflow, Approval Process, Blueprint, Modules and Templates.