52004139 ÷ 9 
The aim is to understand the frequency of 9 in 52004139.

Let's proceed to step 1:
The number 9 fits into 5 0 times, leaving a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Take the next digit (2) from the dividend and append it to 5, then repeat: 52 / 9

Going ahead to step 2:
9 can be fit into 52 5 times, resulting in a remainder of 7.
Use 5 as the next digit of our solution. 
Result so far: 5.0
If we subtract 45 from 52, we get 7.
Fetch the next digit (0) from the dividend, attach it to 7 and continue: 70 / 9

Going ahead to step 3:
9 goes into 70 7 times with a remainder of 7.
Record the quotient 7 as the next digit in the result. 
Result so far: 57.0
The remainder is 7 after subtracting 63 from 70.
Append the next digit (0) from the dividend to 7 and continue with: 70 / 9

Step 4:
70 divided by 9 is 7 with a remainder of 7.
Use 7 as the next digit of our solution. 
Result so far: 577.0
Subtract 63 from 70 to get 7.
Fetch the next digit (4) from the dividend, attach it to 7 and continue: 74 / 9

Moving on to step 5:
If we divide 74 by 9, we get 8 and a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 5778.0
The remainder is 2 after subtracting 72 from 74.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 9

Moving on to step 6:
21 divided by 9 is 2 with a remainder of 3.
The number 2 becomes the next digit in our result. 
Result so far: 57782.0
Subtract 18 from 21 to get 3.
Include the next digit (3) from the dividend after 3, then repeat: 33 / 9

On to step 7:
33 divided by 9 is 3 with a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 577823.0
If we subtract 27 from 33, we get 6.
Include the next digit (9) from the dividend after 6, then repeat: 69 / 9

Advancing to step 8:
69 divided by 9 is 7 with a remainder of 6.
Record the quotient 7 as the next digit in the result. 
Result so far: 5778237.0
Subtracting 63 from 69 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 9:
9 can be fit into 60 6 times, resulting in a remainder of 6.
Record the quotient 6 as the next digit in the result. 
Result so far: 5778237.6
If we take 54 away from 60, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 10:
When dividing 60 by 9, we get 6 with a remainder of 6.
Put 6 as the next digit of the answer. 
Result so far: 5778237.66
The remainder is 6 after subtracting 54 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

After the division, we end up with 5778237.66 and a remainder of 0.006.