We look at the division of 348021 by 39 
The aim is to understand the frequency of 39 in 348021.

On to step 1:
3 divided by 39 is 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Include the next digit (4) from the dividend after 3, then repeat: 34 / 39

Moving on to step 2:
The number 39 fits into 34 0 times, leaving a remainder of 34.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 34 to get 34.
Bring next digit (8) of the dividend behind the 34 and repeat the process: 348 / 39

Let's proceed to step 3:
The number 39 fits into 348 8 times, leaving a remainder of 36.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
The remainder is 36 after subtracting 312 from 348.
Take the next digit (0) from the dividend and append it to 36, then repeat: 360 / 39

On to step 4:
When dividing 360 by 39, we get 9 with a remainder of 9.
Use 9 as the next digit of our solution. 
Result so far: 89.0
If we subtract 351 from 360, we get 9.
Bring next digit (2) of the dividend behind the 9 and repeat the process: 92 / 39

Going ahead to step 5:
92 divided by 39 is 2 with a remainder of 14.
Record the quotient 2 as the next digit in the result. 
Result so far: 892.0
If we take 78 away from 92, we end up with 14.
Fetch the next digit (1) from the dividend, attach it to 14 and continue: 141 / 39

Advancing to step 6:
If we divide 141 by 39, we get 3 and a remainder of 24.
The number 3 becomes the next digit in our result. 
Result so far: 8923.0
If we take 117 away from 141, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 7:
If we divide 240 by 39, we get 6 and a remainder of 6.
Use 6 as the next digit of our solution. 
Result so far: 8923.6
The remainder is 6 after subtracting 234 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 8:
When dividing 60 by 39, we get 1 with a remainder of 21.
The next digit of our result is 1. 
Result so far: 8923.61
If we take 39 away from 60, we end up 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 9:
39 goes into 210 5 times with a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 8923.615
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.

Going ahead to step 10:
39 goes into 150 3 times with a remainder of 33.
The next digit of our result is 3. 
Result so far: 8923.6153
If we take 117 away from 150, we end up 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.

Step 11:
The number 39 fits into 330 8 times, leaving a remainder of 18.
The next digit of our result is 8. 
Result so far: 8923.61538
Subtracting 312 from 330 leaves us 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.

On to step 12:
39 can be fit into 180 4 times, resulting in a remainder of 24.
The next digit of our result is 4. 
Result so far: 8923.615384
The remainder is 24 after subtracting 156 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 13:
When dividing 240 by 39, we get 6 with a remainder of 6.
Use 6 as the next digit of our solution. 
Result so far: 8923.6153846
Deduct 234 from 240 and we're left 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.

Moving on to step 14:
The number 39 fits into 60 1 times, leaving a remainder of 21.
Use 1 as the next digit of our solution. 
Result so far: 8923.61538461
Subtract 39 from 60 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

In conclusion, the division gives 8923.61538461 with a balance of 2.1e-08.