77855 ÷ 28 
The aim is to understand the frequency of 28 in 77855.

Step 1:
When dividing 7 by 28, we get 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Take the next digit (7) from the dividend and append it to 7, then repeat: 77 / 28

On to step 2:
The number 28 fits into 77 2 times, leaving a remainder of 21.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we subtract 56 from 77, we get 21.
Take the next digit (8) from the dividend and append it to 21, then repeat: 218 / 28

Going ahead to step 3:
When dividing 218 by 28, we get 7 with a remainder of 22.
The number 7 becomes the next digit in our result. 
Result so far: 27.0
Deduct 196 from 218 and we're left with 22.
Grab the next digit (5) from the dividend, add it to 22, then carry on: 225 / 28

Let's proceed to step 4:
The number 28 fits into 225 8 times, leaving a remainder of 1.
Use 8 as the next digit of our solution. 
Result so far: 278.0
If we subtract 224 from 225, we get 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 28

Step 5:
28 can be fit into 15 0 times, resulting in a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 2780.0
Subtracting 0 from 15 leaves us 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.

On to step 6:
If we divide 150 by 28, we get 5 and a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 2780.5
If we subtract 140 from 150, we get 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 7:
When dividing 100 by 28, we get 3 with a remainder of 16.
The next digit of our result is 3. 
Result so far: 2780.53
The remainder is 16 after subtracting 84 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 8:
When dividing 160 by 28, we get 5 with a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 2780.535
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 9:
28 goes into 200 7 times with a remainder of 4.
Write down 7 as next digit of the result. 
Result so far: 2780.5357
Deduct 196 from 200 and we're left 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 10:
When dividing 40 by 28, we get 1 with a remainder of 12.
The next digit of our result is 1. 
Result so far: 2780.53571
Deduct 28 from 40 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 11:
28 can be fit into 120 4 times, resulting in a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 2780.535714
Subtract 112 from 120 to 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.

Going ahead to step 12:
When dividing 80 by 28, we get 2 with a remainder of 24.
The number 2 becomes the next digit in our result. 
Result so far: 2780.5357142
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.

Step 13:
If we divide 240 by 28, we get 8 and a remainder of 16.
The next digit of our result is 8. 
Result so far: 2780.53571428
Subtracting 224 from 240 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

After the division, we end up with 2780.53571428 and a remainder of 1.6e-08.