To change the time interval for email refreshing or updating, follow the steps outlined below:

1. Open your email client.
2. Navigate to the Settings or Preferences tab.
   
3. Look for an option to change the refresh or update time interval. Depending on your email application, this may be referred to as Checking Frequency or simply Frequency.
   
4. Change the interval as desired.
5. Save changes and restart your email client.