We look at the division of 28588819 by 403 
The aim is to understand the frequency of 403 in 28588819.

Step 1:
2 divided by 403 is 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 403

Step 2:
When dividing 28 by 403, we get 0 with a remainder of 28.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 28, we end up with 28.
Bring next digit (5) of the dividend behind the 28 and repeat the process: 285 / 403

Going ahead to step 3:
The number 403 fits into 285 0 times, leaving a remainder of 285.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 285 and we're left with 285.
Take the next digit (8) from the dividend and append it to 285, then repeat: 2858 / 403

Advancing to step 4:
When dividing 2858 by 403, we get 7 with a remainder of 37.
The next digit of our result is 7. 
Result so far: 7.0
Subtracting 2821 from 2858 leaves us with 37.
Include the next digit (8) from the dividend after 37, then repeat: 378 / 403

Let's proceed to step 5:
If we divide 378 by 403, we get 0 and a remainder of 378.
Record the quotient 0 as the next digit in the result. 
Result so far: 70.0
If we subtract 0 from 378, we get 378.
Include the next digit (8) from the dividend after 378, then repeat: 3788 / 403

Going ahead to step 6:
3788 divided by 403 is 9 with a remainder of 161.
The number 9 becomes the next digit in our result. 
Result so far: 709.0
If we take 3627 away from 3788, we end up with 161.
Fetch the next digit (1) from the dividend, attach it to 161 and continue: 1611 / 403

Step 7:
403 can be fit into 1611 3 times, resulting in a remainder of 402.
Use 3 as the next digit of our solution. 
Result so far: 7093.0
Deduct 1209 from 1611 and we're left with 402.
Include the next digit (9) from the dividend after 402, then repeat: 4029 / 403

Going ahead to step 8:
If we divide 4029 by 403, we get 9 and a remainder of 402.
The number 9 becomes the next digit in our result. 
Result so far: 70939.0
Subtracting 3627 from 4029 leaves us with 402.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4020, and continue the process.

On to step 9:
When dividing 4020 by 403, we get 9 with a remainder of 393.
The number 9 becomes the next digit in our result. 
Result so far: 70939.9
Subtract 3627 from 4020 to get 393.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3930, and continue the process.

Going ahead to step 10:
403 can be fit into 3930 9 times, resulting in a remainder of 303.
The next digit of our result is 9. 
Result so far: 70939.99
The remainder is 303 after subtracting 3627 from 3930.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3030, and continue the process.

The final outcome is 70939.99, with a leftover of 0.303.