405148 ÷ 39 
The aim is to understand the frequency of 39 in 405148.

Advancing to step 1:
When dividing 4 by 39, we get 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 39

Going ahead to step 2:
If we divide 40 by 39, we get 1 and a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 39 from 40 and we're left with 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 39

Advancing to step 3:
39 goes into 15 0 times with a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 10.0
Subtracting 0 from 15 leaves us with 15.
Fetch the next digit (1) from the dividend, attach it to 15 and continue: 151 / 39

Advancing to step 4:
39 can be fit into 151 3 times, resulting in a remainder of 34.
The number 3 becomes the next digit in our result. 
Result so far: 103.0
If we take 117 away from 151, we end up with 34.
Bring next digit (4) of the dividend behind the 34 and repeat the process: 344 / 39

Step 5:
39 can be fit into 344 8 times, resulting in a remainder of 32.
Record the quotient 8 as the next digit in the result. 
Result so far: 1038.0
If we subtract 312 from 344, we get 32.
Grab the next digit (8) from the dividend, add it to 32, then carry on: 328 / 39

On to step 6:
328 divided by 39 is 8 with a remainder of 16.
Record the quotient 8 as the next digit in the result. 
Result so far: 10388.0
The remainder is 16 after subtracting 312 from 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 7:
160 divided by 39 is 4 with a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 10388.4
If we subtract 156 from 160, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 8:
If we divide 40 by 39, we get 1 and a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 10388.41
Deduct 39 from 40 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 9:
39 can be fit into 10 0 times, resulting in a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 10388.41
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 10:
39 goes into 100 2 times with a remainder of 22.
Use 2 as the next digit of our solution. 
Result so far: 10388.4102
If we take 78 away from 100, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 11:
39 can be fit into 220 5 times, resulting in a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 10388.41025
If we subtract 195 from 220, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 12:
250 divided by 39 is 6 with a remainder of 16.
Put 6 as the next digit of the answer. 
Result so far: 10388.410256
If we subtract 234 from 250, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 13:
39 goes into 160 4 times with a remainder of 4.
Put 4 as the next digit of the answer. 
Result so far: 10388.4102564
If we take 156 away from 160, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 14:
40 divided by 39 is 1 with a remainder of 1.
The next digit of our result is 1. 
Result so far: 10388.41025641
The remainder is 1 after subtracting 39 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final outcome is 10388.41025641, with a leftover of 1e-09.