We're dividing 28759407 by 581 
The aim is to understand the frequency of 581 in 28759407.

Going ahead to step 1:
2 divided by 581 is 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 581

Moving on to step 2:
28 divided by 581 is 0 with a remainder of 28.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 28 after subtracting 0 from 28.
Bring next digit (7) of the dividend behind the 28 and repeat the process: 287 / 581

Advancing to step 3:
581 goes into 287 0 times with a remainder of 287.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 287, we get 287.
Grab the next digit (5) from the dividend, add it to 287, then carry on: 2875 / 581

Moving on to step 4:
When dividing 2875 by 581, we get 4 with a remainder of 551.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtracting 2324 from 2875 leaves us with 551.
Grab the next digit (9) from the dividend, add it to 551, then carry on: 5519 / 581

Moving on to step 5:
581 can be fit into 5519 9 times, resulting in a remainder of 290.
Put 9 as the next digit of the answer. 
Result so far: 49.0
The remainder is 290 after subtracting 5229 from 5519.
Grab the next digit (4) from the dividend, add it to 290, then carry on: 2904 / 581

Advancing to step 6:
The number 581 fits into 2904 4 times, leaving a remainder of 580.
The next digit of our result is 4. 
Result so far: 494.0
If we take 2324 away from 2904, we end up with 580.
Bring next digit (0) of the dividend behind the 580 and repeat the process: 5800 / 581

Moving on to step 7:
The number 581 fits into 5800 9 times, leaving a remainder of 571.
Put 9 as the next digit of the answer. 
Result so far: 4949.0
If we subtract 5229 from 5800, we get 571.
Bring next digit (7) of the dividend behind the 571 and repeat the process: 5717 / 581

Moving on to step 8:
The number 581 fits into 5717 9 times, leaving a remainder of 488.
Use 9 as the next digit of our solution. 
Result so far: 49499.0
If we take 5229 away from 5717, we end up with 488.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4880, and continue the process.

Step 9:
4880 divided by 581 is 8 with a remainder of 232.
Write down 8 as next digit of the result. 
Result so far: 49499.8
If we take 4648 away from 4880, we end up with 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

On to step 10:
581 can be fit into 2320 3 times, resulting in a remainder of 577.
Write down 3 as next digit of the result. 
Result so far: 49499.83
If we take 1743 away from 2320, we end up with 577.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5770, and continue the process.

Step 11:
When dividing 5770 by 581, we get 9 with a remainder of 541.
Record the quotient 9 as the next digit in the result. 
Result so far: 49499.839
Subtracting 5229 from 5770 leaves us with 541.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5410, and continue the process.

Advancing to step 12:
581 goes into 5410 9 times with a remainder of 181.
The number 9 becomes the next digit in our result. 
Result so far: 49499.8399
Deduct 5229 from 5410 and we're left with 181.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1810, and continue the process.

Our division results in 49499.8399 with a remaining 0.00181.