539633 divided by 9 
The aim is to understand the frequency of 9 in 539633.

On to step 1:
9 can be fit into 5 0 times, resulting in a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Bring next digit (3) of the dividend behind the 5 and repeat the process: 53 / 9

On to step 2:
9 can be fit into 53 5 times, resulting in a remainder of 8.
Write down 5 as next digit of the result. 
Result so far: 5.0
The remainder is 8 after subtracting 45 from 53.
Take the next digit (9) from the dividend and append it to 8, then repeat: 89 / 9

Let's proceed to step 3:
89 divided by 9 is 9 with a remainder of 8.
Put 9 as the next digit of the answer. 
Result so far: 59.0
The remainder is 8 after subtracting 81 from 89.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 9

Moving on to step 4:
When dividing 86 by 9, we get 9 with a remainder of 5.
The number 9 becomes the next digit in our result. 
Result so far: 599.0
If we subtract 81 from 86, we get 5.
Include the next digit (3) from the dividend after 5, then repeat: 53 / 9

Step 5:
If we divide 53 by 9, we get 5 and a remainder of 8.
Use 5 as the next digit of our solution. 
Result so far: 5995.0
Subtracting 45 from 53 leaves us with 8.
Take the next digit (3) from the dividend and append it to 8, then repeat: 83 / 9

Step 6:
The number 9 fits into 83 9 times, leaving a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 59959.0
Subtract 81 from 83 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 7:
9 goes into 20 2 times with a remainder of 2.
The number 2 becomes the next digit in our result. 
Result so far: 59959.2
Subtracting 18 from 20 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 8:
20 divided by 9 is 2 with a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 59959.22
Subtracting 18 from 20 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Our division results in 59959.22 with a remaining 0.002.