Count the same numbers in rows and columns php mysql

I have MySql table like this :

+----+----+----+
| g1 | g2 | g3 |
+----+----+----+
| 1  | 2  | 5  |
+----+----+----+
| 5  | 1  | 3  |
+----+----+----+
| 1  | 3  | 4  |
+----+----+----+

And I need get output in PHP like:

number 1 is used 4 times
number 2 is used 1 time
number 3 is used 2 times

I make some code but it only write me how many time I used the number and I don't know how to add whitch number. Thi is my code:

for ( $i=1 ; $i<=20; $i++){

            $query = mysql_query("SELECT g1, g2, g3d FROM users 
            WHERE g1 = $i OR g2 = $i OR g3 = $i ") or die(mysql_error()) ;

            $row1 = mysql_num_rows($query);

        $row = mysql_fetch_array($query)    ;
            if ($row1 >=1){echo $row1; }
        }

Thanks for any help.