Let's divide 390801 by 28
The aim is to understand the frequency of 28 in 390801.

Let's proceed to step 1:
If we divide 3 by 28, we get 0 and a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 28

Moving on to step 2:
When dividing 39 by 28, we get 1 with a remainder of 11.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 11 after subtracting 28 from 39.
Grab the next digit (0) from the dividend, add it to 11, then carry on: 110 / 28

Moving on to step 3:
110 divided by 28 is 3 with a remainder of 26.
Use 3 as the next digit of our solution. 
Result so far: 13.0
If we subtract 84 from 110, we get 26.
Bring next digit (8) of the dividend behind the 26 and repeat the process: 268 / 28

Step 4:
268 divided by 28 is 9 with a remainder of 16.
The next digit of our result is 9. 
Result so far: 139.0
Subtracting 252 from 268 leaves us with 16.
Append the next digit (0) from the dividend to 16 and continue with: 160 / 28

On to step 5:
The number 28 fits into 160 5 times, leaving a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 1395.0
If we subtract 140 from 160, we get 20.
Append the next digit (1) from the dividend to 20 and continue with: 201 / 28

On to step 6:
When dividing 201 by 28, we get 7 with a remainder of 5.
Write down 7 as next digit of the result. 
Result so far: 13957.0
If we subtract 196 from 201, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 7:
50 divided by 28 is 1 with a remainder of 22.
The next digit of our result is 1. 
Result so far: 13957.1
Subtracting 28 from 50 leaves us 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.

Advancing to step 8:
28 goes into 220 7 times with a remainder of 24.
Record the quotient 7 as the next digit in the result. 
Result so far: 13957.17
Deduct 196 from 220 and we're left 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.

Going ahead to step 9:
28 can be fit into 240 8 times, resulting in a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 13957.178
The remainder is 16 after subtracting 224 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 10:
28 goes into 160 5 times with a remainder of 20.
Use 5 as the next digit of our solution. 
Result so far: 13957.1785
Subtracting 140 from 160 leaves us 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.

Step 11:
The number 28 fits into 200 7 times, leaving a remainder of 4.
Write down 7 as next digit of the result. 
Result so far: 13957.17857
Subtracting 196 from 200 leaves us 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.

Going ahead to step 12:
If we divide 40 by 28, we get 1 and a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 13957.178571
Subtract 28 from 40 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 13:
120 divided by 28 is 4 with a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 13957.1785714
Subtracting 112 from 120 leaves us 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.

Moving on to step 14:
80 divided by 28 is 2 with a remainder of 24.
The next digit of our result is 2. 
Result so far: 13957.17857142
Subtract 56 from 80 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.

The quotient of the division is 13957.17857142, and the remainder is 2.4e-08.