28079309 divided by 625 
The aim is to understand the frequency of 625 in 28079309.

On to step 1:
If we divide 2 by 625, we get 0 and a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Bring next digit (8) of the dividend behind the 2 and repeat the process: 28 / 625

Step 2:
28 divided by 625 is 0 with a remainder of 28.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 28, we get 28.
Append the next digit (0) from the dividend to 28 and continue with: 280 / 625

On to step 3:
The number 625 fits into 280 0 times, leaving a remainder of 280.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 280 and we're left with 280.
Include the next digit (7) from the dividend after 280, then repeat: 2807 / 625

Going ahead to step 4:
625 goes into 2807 4 times with a remainder of 307.
The next digit of our result is 4. 
Result so far: 4.0
The remainder is 307 after subtracting 2500 from 2807.
Grab the next digit (9) from the dividend, add it to 307, then carry on: 3079 / 625

Step 5:
625 can be fit into 3079 4 times, resulting in a remainder of 579.
The number 4 becomes the next digit in our result. 
Result so far: 44.0
If we take 2500 away from 3079, we end up with 579.
Take the next digit (3) from the dividend and append it to 579, then repeat: 5793 / 625

Going ahead to step 6:
5793 divided by 625 is 9 with a remainder of 168.
The next digit of our result is 9. 
Result so far: 449.0
If we take 5625 away from 5793, we end up with 168.
Take the next digit (0) from the dividend and append it to 168, then repeat: 1680 / 625

Step 7:
If we divide 1680 by 625, we get 2 and a remainder of 430.
Use 2 as the next digit of our solution. 
Result so far: 4492.0
Subtract 1250 from 1680 to get 430.
Include the next digit (9) from the dividend after 430, then repeat: 4309 / 625

Going ahead to step 8:
When dividing 4309 by 625, we get 6 with a remainder of 559.
Write down 6 as next digit of the result. 
Result so far: 44926.0
Deduct 3750 from 4309 and we're left with 559.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5590, and continue the process.

Moving on to step 9:
When dividing 5590 by 625, we get 8 with a remainder of 590.
Write down 8 as next digit of the result. 
Result so far: 44926.8
If we take 5000 away from 5590, we end up with 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

On to step 10:
The number 625 fits into 5900 9 times, leaving a remainder of 275.
Put 9 as the next digit of the answer. 
Result so far: 44926.89
Deduct 5625 from 5900 and we're left with 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Moving on to step 11:
625 can be fit into 2750 4 times, resulting in a remainder of 250.
Record the quotient 4 as the next digit in the result. 
Result so far: 44926.894
If we take 2500 away from 2750, we end up with 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Let's proceed to step 12:
The number 625 fits into 2500 4 times, leaving a remainder of 0.
The next digit of our result is 4. 
Result so far: 44926.8944
Subtracting 2500 from 2500 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 44926.8944 with a remaining 0.0.