'Calculating the average for the number of records in the table

I am read the number of orders sorted by day of the week from the database.

SELECT 
        COUNT(`ID`),
        DAYNAME(`WorkingDay`) AS Day_name
        FROM status 
        WHERE
        NameFinish = "Employer1" 
        
        GROUP BY Day_name
        ORDER BY (
            CASE DAYOFWEEK(`WorkingDay`)
            WHEN 1 THEN 5 ELSE DAYOFWEEK(`WorkingDay`)
            END);

i Get the result:

COUNT(`ID`) Day_name    
83  Monday  
79  Tuesday 
81  Wednesday   
76  Thursday    
77  Friday  
9   Saturday

How can I now calculate the average of all Count IDs with regard to the amount of days in the "Day_name" column?



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