351292 ÷ 39 
The aim is to understand the frequency of 39 in 351292.

Step 1:
When dividing 3 by 39, we get 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Include the next digit (5) from the dividend after 3, then repeat: 35 / 39

Going ahead to step 2:
39 can be fit into 35 0 times, resulting in a remainder of 35.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 35, we get 35.
Grab the next digit (1) from the dividend, add it to 35, then carry on: 351 / 39

Step 3:
351 divided by 39 is 9 with a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 9.0
If we subtract 351 from 351, we get 0.
Bring next digit (2) of the dividend behind the 0 and repeat the process: 2 / 39

Step 4:
39 goes into 2 0 times with a remainder of 2.
The next digit of our result is 0. 
Result so far: 90.0
Subtracting 0 from 2 leaves us with 2.
Take the next digit (9) from the dividend and append it to 2, then repeat: 29 / 39

Let's proceed to step 5:
39 can be fit into 29 0 times, resulting in a remainder of 29.
Put 0 as the next digit of the answer. 
Result so far: 900.0
Subtract 0 from 29 to get 29.
Bring next digit (2) of the dividend behind the 29 and repeat the process: 292 / 39

Advancing to step 6:
39 can be fit into 292 7 times, resulting in a remainder of 19.
Put 7 as the next digit of the answer. 
Result so far: 9007.0
Subtract 273 from 292 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 7:
190 divided by 39 is 4 with a remainder of 34.
Record the quotient 4 as the next digit in the result. 
Result so far: 9007.4
The remainder is 34 after subtracting 156 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 8:
39 goes into 340 8 times with a remainder of 28.
Use 8 as the next digit of our solution. 
Result so far: 9007.48
Subtracting 312 from 340 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 9:
When dividing 280 by 39, we get 7 with a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 9007.487
If we take 273 away from 280, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 10:
39 goes into 70 1 times with a remainder of 31.
Put 1 as the next digit of the answer. 
Result so far: 9007.4871
Subtract 39 from 70 to get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Advancing to step 11:
If we divide 310 by 39, we get 7 and a remainder of 37.
Record the quotient 7 as the next digit in the result. 
Result so far: 9007.48717
Deduct 273 from 310 and we're left with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 12:
370 divided by 39 is 9 with a remainder of 19.
The number 9 becomes the next digit in our result. 
Result so far: 9007.487179
The remainder is 19 after subtracting 351 from 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 13:
39 goes into 190 4 times with a remainder of 34.
The number 4 becomes the next digit in our result. 
Result so far: 9007.4871794
Subtracting 156 from 190 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 14:
39 can be fit into 340 8 times, resulting in a remainder of 28.
Record the quotient 8 as the next digit in the result. 
Result so far: 9007.48717948
Subtract 312 from 340 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

The final result is 9007.48717948 with a remainder of 2.8e-08.