We look at the division of 21145486 by 228 
The aim is to understand the frequency of 228 in 21145486.

Advancing to step 1:
228 goes into 2 0 times with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 228

Let's proceed to step 2:
If we divide 21 by 228, we get 0 and a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Fetch the next digit (1) from the dividend, attach it to 21 and continue: 211 / 228

Let's proceed to step 3:
228 can be fit into 211 0 times, resulting in a remainder of 211.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 211 leaves us with 211.
Include the next digit (4) from the dividend after 211, then repeat: 2114 / 228

On to step 4:
2114 divided by 228 is 9 with a remainder of 62.
Use 9 as the next digit of our solution. 
Result so far: 9.0
If we take 2052 away from 2114, we end up with 62.
Bring next digit (5) of the dividend behind the 62 and repeat the process: 625 / 228

Step 5:
228 goes into 625 2 times with a remainder of 169.
The number 2 becomes the next digit in our result. 
Result so far: 92.0
If we take 456 away from 625, we end up with 169.
Include the next digit (4) from the dividend after 169, then repeat: 1694 / 228

Going ahead to step 6:
When dividing 1694 by 228, we get 7 with a remainder of 98.
Put 7 as the next digit of the answer. 
Result so far: 927.0
If we take 1596 away from 1694, we end up with 98.
Bring next digit (8) of the dividend behind the 98 and repeat the process: 988 / 228

Let's proceed to step 7:
If we divide 988 by 228, we get 4 and a remainder of 76.
Record the quotient 4 as the next digit in the result. 
Result so far: 9274.0
Deduct 912 from 988 and we're left with 76.
Fetch the next digit (6) from the dividend, attach it to 76 and continue: 766 / 228

Going ahead to step 8:
If we divide 766 by 228, we get 3 and a remainder of 82.
Write down 3 as next digit of the result. 
Result so far: 92743.0
Subtract 684 from 766 to get 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

On to step 9:
When dividing 820 by 228, we get 3 with a remainder of 136.
Record the quotient 3 as the next digit in the result. 
Result so far: 92743.3
Subtract 684 from 820 to get 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Step 10:
228 can be fit into 1360 5 times, resulting in a remainder of 220.
Record the quotient 5 as the next digit in the result. 
Result so far: 92743.35
Subtracting 1140 from 1360 leaves us with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Let's proceed to step 11:
The number 228 fits into 2200 9 times, leaving a remainder of 148.
Write down 9 as next digit of the result. 
Result so far: 92743.359
If we subtract 2052 from 2200, we get 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Moving on to step 12:
1480 divided by 228 is 6 with a remainder of 112.
The next digit of our result is 6. 
Result so far: 92743.3596
Deduct 1368 from 1480 and we're left with 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Step 13:
228 goes into 1120 4 times with a remainder of 208.
Use 4 as the next digit of our solution. 
Result so far: 92743.35964
Subtract 912 from 1120 to get 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Advancing to step 14:
When dividing 2080 by 228, we get 9 with a remainder of 28.
Record the quotient 9 as the next digit in the result. 
Result so far: 92743.359649
Subtract 2052 from 2080 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 15:
228 goes into 280 1 times with a remainder of 52.
Use 1 as the next digit of our solution. 
Result so far: 92743.3596491
Subtract 228 from 280 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 16:
When dividing 520 by 228, we get 2 with a remainder of 64.
The next digit of our result is 2. 
Result so far: 92743.35964912
If we subtract 456 from 520, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Our division results in 92743.35964912 with a remaining 6.4e-08.