We're dividing 90264902 by 221 
The aim is to understand the frequency of 221 in 90264902.

On to step 1:
9 divided by 221 is 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 221

Advancing to step 2:
221 goes into 90 0 times with a remainder of 90.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 90, we get 90.
Grab the next digit (2) from the dividend, add it to 90, then carry on: 902 / 221

Advancing to step 3:
The number 221 fits into 902 4 times, leaving a remainder of 18.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Deduct 884 from 902 and we're left with 18.
Fetch the next digit (6) from the dividend, attach it to 18 and continue: 186 / 221

Let's proceed to step 4:
221 goes into 186 0 times with a remainder of 186.
The number 0 becomes the next digit in our result. 
Result so far: 40.0
Subtract 0 from 186 to get 186.
Append the next digit (4) from the dividend to 186 and continue with: 1864 / 221

Step 5:
The number 221 fits into 1864 8 times, leaving a remainder of 96.
Put 8 as the next digit of the answer. 
Result so far: 408.0
If we subtract 1768 from 1864, we get 96.
Fetch the next digit (9) from the dividend, attach it to 96 and continue: 969 / 221

Let's proceed to step 6:
When dividing 969 by 221, we get 4 with a remainder of 85.
The number 4 becomes the next digit in our result. 
Result so far: 4084.0
If we take 884 away from 969, we end up with 85.
Include the next digit (0) from the dividend after 85, then repeat: 850 / 221

Advancing to step 7:
When dividing 850 by 221, we get 3 with a remainder of 187.
Write down 3 as next digit of the result. 
Result so far: 40843.0
Deduct 663 from 850 and we're left with 187.
Bring next digit (2) of the dividend behind the 187 and repeat the process: 1872 / 221

Let's proceed to step 8:
221 can be fit into 1872 8 times, resulting in a remainder of 104.
Use 8 as the next digit of our solution. 
Result so far: 408438.0
Subtract 1768 from 1872 to get 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Let's proceed to step 9:
1040 divided by 221 is 4 with a remainder of 156.
The number 4 becomes the next digit in our result. 
Result so far: 408438.4
Subtracting 884 from 1040 leaves us with 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Going ahead to step 10:
If we divide 1560 by 221, we get 7 and a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 408438.47
Subtracting 1547 from 1560 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 11:
When dividing 130 by 221, we get 0 with a remainder of 130.
Write down 0 as next digit of the result. 
Result so far: 408438.47
Deduct 0 from 130 and we're left with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Let's proceed to step 12:
If we divide 1300 by 221, we get 5 and a remainder of 195.
Record the quotient 5 as the next digit in the result. 
Result so far: 408438.4705
If we subtract 1105 from 1300, we get 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Going ahead to step 13:
221 goes into 1950 8 times with a remainder of 182.
Use 8 as the next digit of our solution. 
Result so far: 408438.47058
If we subtract 1768 from 1950, we get 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

Advancing to step 14:
1820 divided by 221 is 8 with a remainder of 52.
The next digit of our result is 8. 
Result so far: 408438.470588
Subtracting 1768 from 1820 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Our division results in 408438.470588 with a remaining 5.2e-06.