We look at the division of 28177428 by 687 
The aim is to understand the frequency of 687 in 28177428.

On to step 1:
687 can be fit into 2 0 times, resulting in a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 687

Step 2:
687 goes into 28 0 times with a remainder of 28.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 28 and we're left with 28.
Append the next digit (1) from the dividend to 28 and continue with: 281 / 687

Let's proceed to step 3:
281 divided by 687 is 0 with a remainder of 281.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 281 and we're left with 281.
Take the next digit (7) from the dividend and append it to 281, then repeat: 2817 / 687

Going ahead to step 4:
687 can be fit into 2817 4 times, resulting in a remainder of 69.
The next digit of our result is 4. 
Result so far: 4.0
If we subtract 2748 from 2817, we get 69.
Bring next digit (7) of the dividend behind the 69 and repeat the process: 697 / 687

On to step 5:
687 goes into 697 1 times with a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 41.0
If we take 687 away from 697, we end up with 10.
Take the next digit (4) from the dividend and append it to 10, then repeat: 104 / 687

Moving on to step 6:
687 goes into 104 0 times with a remainder of 104.
The next digit of our result is 0. 
Result so far: 410.0
Deduct 0 from 104 and we're left with 104.
Include the next digit (2) from the dividend after 104, then repeat: 1042 / 687

On to step 7:
687 goes into 1042 1 times with a remainder of 355.
Write down 1 as next digit of the result. 
Result so far: 4101.0
Deduct 687 from 1042 and we're left with 355.
Fetch the next digit (8) from the dividend, attach it to 355 and continue: 3558 / 687

Let's proceed to step 8:
687 goes into 3558 5 times with a remainder of 123.
Use 5 as the next digit of our solution. 
Result so far: 41015.0
Subtract 3435 from 3558 to get 123.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1230, and continue the process.

Moving on to step 9:
687 can be fit into 1230 1 times, resulting in a remainder of 543.
Write down 1 as next digit of the result. 
Result so far: 41015.1
The remainder is 543 after subtracting 687 from 1230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5430, and continue the process.

On to step 10:
If we divide 5430 by 687, we get 7 and a remainder of 621.
Record the quotient 7 as the next digit in the result. 
Result so far: 41015.17
If we subtract 4809 from 5430, we get 621.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6210, and continue the process.

On to step 11:
When dividing 6210 by 687, we get 9 with a remainder of 27.
Put 9 as the next digit of the answer. 
Result so far: 41015.179
The remainder is 27 after subtracting 6183 from 6210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Step 12:
If we divide 270 by 687, we get 0 and a remainder of 270.
Write down 0 as next digit of the result. 
Result so far: 41015.179
If we take 0 away from 270, we end up with 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Step 13:
687 can be fit into 2700 3 times, resulting in a remainder of 639.
Write down 3 as next digit of the result. 
Result so far: 41015.17903
If we subtract 2061 from 2700, we get 639.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6390, and continue the process.

Advancing to step 14:
6390 divided by 687 is 9 with a remainder of 207.
Use 9 as the next digit of our solution. 
Result so far: 41015.179039
Subtract 6183 from 6390 to get 207.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2070, and continue the process.

Let's proceed to step 15:
When dividing 2070 by 687, we get 3 with a remainder of 9.
Record the quotient 3 as the next digit in the result. 
Result so far: 41015.1790393
If we subtract 2061 from 2070, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 16:
687 can be fit into 90 0 times, resulting in a remainder of 90.
The number 0 becomes the next digit in our result. 
Result so far: 41015.1790393
The remainder is 90 after subtracting 0 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

After the division, we end up with 41015.1790393 and a remainder of 9e-08.