728843 ÷ 39 
The aim is to understand the frequency of 39 in 728843.

Let's proceed to step 1:
The number 39 fits into 7 0 times, leaving a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Grab the next digit (2) from the dividend, add it to 7, then carry on: 72 / 39

Advancing to step 2:
39 goes into 72 1 times with a remainder of 33.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 39 away from 72, we end up with 33.
Grab the next digit (8) from the dividend, add it to 33, then carry on: 338 / 39

Advancing to step 3:
39 can be fit into 338 8 times, resulting in a remainder of 26.
Put 8 as the next digit of the answer. 
Result so far: 18.0
Deduct 312 from 338 and we're left with 26.
Grab the next digit (8) from the dividend, add it to 26, then carry on: 268 / 39

On to step 4:
39 can be fit into 268 6 times, resulting in a remainder of 34.
The number 6 becomes the next digit in our result. 
Result so far: 186.0
Subtracting 234 from 268 leaves us with 34.
Take the next digit (4) from the dividend and append it to 34, then repeat: 344 / 39

On to step 5:
If we divide 344 by 39, we get 8 and a remainder of 32.
The next digit of our result is 8. 
Result so far: 1868.0
If we take 312 away from 344, we end up with 32.
Bring next digit (3) of the dividend behind the 32 and repeat the process: 323 / 39

Step 6:
The number 39 fits into 323 8 times, leaving a remainder of 11.
Record the quotient 8 as the next digit in the result. 
Result so far: 18688.0
Subtract 312 from 323 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 7:
39 can be fit into 110 2 times, resulting in a remainder of 32.
The number 2 becomes the next digit in our result. 
Result so far: 18688.2
If we subtract 78 from 110, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 8:
If we divide 320 by 39, we get 8 and a remainder of 8.
The number 8 becomes the next digit in our result. 
Result so far: 18688.28
If we subtract 312 from 320, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 9:
The number 39 fits into 80 2 times, leaving a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 18688.282
If we subtract 78 from 80, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 10:
If we divide 20 by 39, we get 0 and a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 18688.282
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 11:
39 goes into 200 5 times with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 18688.28205
The remainder is 5 after subtracting 195 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 12:
39 can be fit into 50 1 times, resulting in a remainder of 11.
The next digit of our result is 1. 
Result so far: 18688.282051
The remainder is 11 after subtracting 39 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 13:
The number 39 fits into 110 2 times, leaving a remainder of 32.
Use 2 as the next digit of our solution. 
Result so far: 18688.2820512
Subtracting 78 from 110 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 14:
39 goes into 320 8 times with a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 18688.28205128
If we take 312 away from 320, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

After the division, we end up with 18688.28205128 and a remainder of 8e-09.