Let's divide 28640921 by 113
The aim is to understand the frequency of 113 in 28640921.

Going ahead to step 1:
2 divided by 113 is 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Bring next digit (8) of the dividend behind the 2 and repeat the process: 28 / 113

Advancing to step 2:
113 can be fit into 28 0 times, resulting in 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.
Include the next digit (6) from the dividend after 28, then repeat: 286 / 113

Advancing to step 3:
113 goes into 286 2 times with a remainder of 60.
The next digit of our result is 2. 
Result so far: 2.0
If we take 226 away from 286, we end up with 60.
Include the next digit (4) from the dividend after 60, then repeat: 604 / 113

Going ahead to step 4:
If we divide 604 by 113, we get 5 and a remainder of 39.
The number 5 becomes the next digit in our result. 
Result so far: 25.0
If we take 565 away from 604, we end up with 39.
Grab the next digit (0) from the dividend, add it to 39, then carry on: 390 / 113

Let's proceed to step 5:
113 goes into 390 3 times with a remainder of 51.
Record the quotient 3 as the next digit in the result. 
Result so far: 253.0
Subtracting 339 from 390 leaves us with 51.
Include the next digit (9) from the dividend after 51, then repeat: 519 / 113

Moving on to step 6:
The number 113 fits into 519 4 times, leaving a remainder of 67.
The number 4 becomes the next digit in our result. 
Result so far: 2534.0
The remainder is 67 after subtracting 452 from 519.
Include the next digit (2) from the dividend after 67, then repeat: 672 / 113

Moving on to step 7:
113 goes into 672 5 times with a remainder of 107.
Put 5 as the next digit of the answer. 
Result so far: 25345.0
Deduct 565 from 672 and we're left with 107.
Grab the next digit (1) from the dividend, add it to 107, then carry on: 1071 / 113

Advancing to step 8:
If we divide 1071 by 113, we get 9 and a remainder of 54.
Write down 9 as next digit of the result. 
Result so far: 253459.0
Subtracting 1017 from 1071 leaves us with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Moving on to step 9:
540 divided by 113 is 4 with a remainder of 88.
Write down 4 as next digit of the result. 
Result so far: 253459.4
If we subtract 452 from 540, we get 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Moving on to step 10:
When dividing 880 by 113, we get 7 with a remainder of 89.
Write down 7 as next digit of the result. 
Result so far: 253459.47
Deduct 791 from 880 and we're left with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Moving on to step 11:
If we divide 890 by 113, we get 7 and a remainder of 99.
The number 7 becomes the next digit in our result. 
Result so far: 253459.477
Deduct 791 from 890 and we're left with 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

The final result is 253459.477 with a remainder of 0.0099.