We look at the division of 90724284 by 223 
The aim is to understand the frequency of 223 in 90724284.

Step 1:
If we divide 9 by 223, we get 0 and a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 223

Step 2:
90 divided by 223 is 0 with a remainder of 90.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 90 after subtracting 0 from 90.
Fetch the next digit (7) from the dividend, attach it to 90 and continue: 907 / 223

On to step 3:
If we divide 907 by 223, we get 4 and a remainder of 15.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtracting 892 from 907 leaves us with 15.
Append the next digit (2) from the dividend to 15 and continue with: 152 / 223

Advancing to step 4:
223 goes into 152 0 times with a remainder of 152.
Write down 0 as next digit of the result. 
Result so far: 40.0
If we take 0 away from 152, we end up with 152.
Include the next digit (4) from the dividend after 152, then repeat: 1524 / 223

Going ahead to step 5:
1524 divided by 223 is 6 with a remainder of 186.
Write down 6 as next digit of the result. 
Result so far: 406.0
Deduct 1338 from 1524 and we're left with 186.
Append the next digit (2) from the dividend to 186 and continue with: 1862 / 223

On to step 6:
1862 divided by 223 is 8 with a remainder of 78.
Record the quotient 8 as the next digit in the result. 
Result so far: 4068.0
If we subtract 1784 from 1862, we get 78.
Include the next digit (8) from the dividend after 78, then repeat: 788 / 223

On to step 7:
If we divide 788 by 223, we get 3 and a remainder of 119.
Use 3 as the next digit of our solution. 
Result so far: 40683.0
Subtracting 669 from 788 leaves us with 119.
Include the next digit (4) from the dividend after 119, then repeat: 1194 / 223

Moving on to step 8:
1194 divided by 223 is 5 with a remainder of 79.
Put 5 as the next digit of the answer. 
Result so far: 406835.0
If we take 1115 away from 1194, we end up with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Step 9:
The number 223 fits into 790 3 times, leaving a remainder of 121.
Put 3 as the next digit of the answer. 
Result so far: 406835.3
If we subtract 669 from 790, we get 121.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1210, and continue the process.

Step 10:
If we divide 1210 by 223, we get 5 and a remainder of 95.
The number 5 becomes the next digit in our result. 
Result so far: 406835.35
Deduct 1115 from 1210 and we're left with 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

Going ahead to step 11:
223 can be fit into 950 4 times, resulting in a remainder of 58.
Write down 4 as next digit of the result. 
Result so far: 406835.354
Subtract 892 from 950 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Step 12:
The number 223 fits into 580 2 times, leaving a remainder of 134.
The next digit of our result is 2. 
Result so far: 406835.3542
If we subtract 446 from 580, we get 134.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1340, and continue the process.

On to step 13:
If we divide 1340 by 223, we get 6 and a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 406835.35426
Subtract 1338 from 1340 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 14:
223 can be fit into 20 0 times, resulting in a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 406835.35426
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 15:
The number 223 fits into 200 0 times, leaving a remainder of 200.
Write down 0 as next digit of the result. 
Result so far: 406835.35426
Deduct 0 from 200 and we're left with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

After the division, we end up with 406835.35426 and a remainder of 2e-06.