We look at the division of 391032 by 39 
The aim is to understand the frequency of 39 in 391032.

Step 1:
39 can be fit into 3 0 times, resulting in a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 39

Step 2:
39 goes into 39 1 times with a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 39 from 39 leaves us with 0.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 39

Moving on to step 3:
If we divide 1 by 39, we get 0 and a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 10.0
If we take 0 away from 1, we end up with 1.
Include the next digit (0) from the dividend after 1, then repeat: 10 / 39

Advancing to step 4:
If we divide 10 by 39, we get 0 and a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 100.0
If we take 0 away from 10, we end up with 10.
Grab the next digit (3) from the dividend, add it to 10, then carry on: 103 / 39

On to step 5:
103 divided by 39 is 2 with a remainder of 25.
The next digit of our result is 2. 
Result so far: 1002.0
Subtracting 78 from 103 leaves us with 25.
Fetch the next digit (2) from the dividend, attach it to 25 and continue: 252 / 39

On to step 6:
When dividing 252 by 39, we get 6 with a remainder of 18.
Use 6 as the next digit of our solution. 
Result so far: 10026.0
Deduct 234 from 252 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 7:
When dividing 180 by 39, we get 4 with a remainder of 24.
Write down 4 as next digit of the result. 
Result so far: 10026.4
If we subtract 156 from 180, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 8:
The number 39 fits into 240 6 times, leaving a remainder of 6.
Record the quotient 6 as the next digit in the result. 
Result so far: 10026.46
Subtracting 234 from 240 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.

On to step 9:
When dividing 60 by 39, we get 1 with a remainder of 21.
The next digit of our result is 1. 
Result so far: 10026.461
Subtracting 39 from 60 leaves us with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 10:
39 can be fit into 210 5 times, resulting in a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 10026.4615
Deduct 195 from 210 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 11:
150 divided by 39 is 3 with a remainder of 33.
Write down 3 as next digit of the result. 
Result so far: 10026.46153
Deduct 117 from 150 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Let's proceed to step 12:
39 can be fit into 330 8 times, resulting in a remainder of 18.
Write down 8 as next digit of the result. 
Result so far: 10026.461538
Deduct 312 from 330 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 13:
The number 39 fits into 180 4 times, leaving a remainder of 24.
Use 4 as the next digit of our solution. 
Result so far: 10026.4615384
Subtract 156 from 180 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 14:
If we divide 240 by 39, we get 6 and a remainder of 6.
The number 6 becomes the next digit in our result. 
Result so far: 10026.46153846
If we take 234 away from 240, 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.

After the division, we end up with 10026.46153846 and a remainder of 6e-09.