We look at the division of 550404 by 9 
The aim is to understand the frequency of 9 in 550404.

On to step 1:
The number 9 fits into 5 0 times, leaving a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Include the next digit (5) from the dividend after 5, then repeat: 55 / 9

Let's proceed to step 2:
The number 9 fits into 55 6 times, leaving a remainder of 1.
Put 6 as the next digit of the answer. 
Result so far: 6.0
If we subtract 54 from 55, we get 1.
Grab the next digit (0) from the dividend, add it to 1, then carry on: 10 / 9

Let's proceed to step 3:
10 divided by 9 is 1 with a remainder of 1.
The next digit of our result is 1. 
Result so far: 61.0
Subtract 9 from 10 to get 1.
Take the next digit (4) from the dividend and append it to 1, then repeat: 14 / 9

Advancing to step 4:
14 divided by 9 is 1 with a remainder of 5.
The next digit of our result is 1. 
Result so far: 611.0
If we subtract 9 from 14, we get 5.
Grab the next digit (0) from the dividend, add it to 5, then carry on: 50 / 9

Advancing to step 5:
50 divided by 9 is 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 6115.0
Subtracting 45 from 50 leaves us with 5.
Append the next digit (4) from the dividend to 5 and continue with: 54 / 9

Moving on to step 6:
The number 9 fits into 54 6 times, leaving a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 61156.0
The remainder is 0 after subtracting 54 from 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 7:
The number 9 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 61156.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
When dividing 0 by 9, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 61156.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 61156.0, and the remainder is 0.0.