We look at the division of 71456826 by 221 
The aim is to understand the frequency of 221 in 71456826.

Going ahead to step 1:
If we divide 7 by 221, we get 0 and a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (1) of the dividend behind the 7 and repeat the process: 71 / 221

On to step 2:
71 divided by 221 is 0 with a remainder of 71.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 71 after subtracting 0 from 71.
Append the next digit (4) from the dividend to 71 and continue with: 714 / 221

Going ahead to step 3:
221 can be fit into 714 3 times, resulting in a remainder of 51.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtracting 663 from 714 leaves us with 51.
Append the next digit (5) from the dividend to 51 and continue with: 515 / 221

Going ahead to step 4:
221 can be fit into 515 2 times, resulting in a remainder of 73.
The next digit of our result is 2. 
Result so far: 32.0
Subtract 442 from 515 to get 73.
Include the next digit (6) from the dividend after 73, then repeat: 736 / 221

Step 5:
The number 221 fits into 736 3 times, leaving a remainder of 73.
Put 3 as the next digit of the answer. 
Result so far: 323.0
If we subtract 663 from 736, we get 73.
Take the next digit (8) from the dividend and append it to 73, then repeat: 738 / 221

Moving on to step 6:
The number 221 fits into 738 3 times, leaving a remainder of 75.
Record the quotient 3 as the next digit in the result. 
Result so far: 3233.0
If we take 663 away from 738, we end up with 75.
Append the next digit (2) from the dividend to 75 and continue with: 752 / 221

Moving on to step 7:
If we divide 752 by 221, we get 3 and a remainder of 89.
Put 3 as the next digit of the answer. 
Result so far: 32333.0
Subtract 663 from 752 to get 89.
Bring next digit (6) of the dividend behind the 89 and repeat the process: 896 / 221

On to step 8:
The number 221 fits into 896 4 times, leaving a remainder of 12.
The next digit of our result is 4. 
Result so far: 323334.0
Subtract 884 from 896 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 9:
If we divide 120 by 221, we get 0 and a remainder of 120.
Write down 0 as next digit of the result. 
Result so far: 323334.0
Subtracting 0 from 120 leaves us with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Going ahead to step 10:
If we divide 1200 by 221, we get 5 and a remainder of 95.
Put 5 as the next digit of the answer. 
Result so far: 323334.05
Subtract 1105 from 1200 to get 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:
221 can be fit into 950 4 times, resulting in a remainder of 66.
Use 4 as the next digit of our solution. 
Result so far: 323334.054
Subtract 884 from 950 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Step 12:
221 goes into 660 2 times with a remainder of 218.
Use 2 as the next digit of our solution. 
Result so far: 323334.0542
If we take 442 away from 660, we end up with 218.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2180, and continue the process.

Step 13:
221 can be fit into 2180 9 times, resulting in a remainder of 191.
Write down 9 as next digit of the result. 
Result so far: 323334.05429
Subtracting 1989 from 2180 leaves us with 191.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1910, and continue the process.

Going ahead to step 14:
The number 221 fits into 1910 8 times, leaving a remainder of 142.
Put 8 as the next digit of the answer. 
Result so far: 323334.054298
Deduct 1768 from 1910 and we're left with 142.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1420, and continue the process.

Step 15:
221 goes into 1420 6 times with a remainder of 94.
Use 6 as the next digit of our solution. 
Result so far: 323334.0542986
If we take 1326 away from 1420, we end up with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Let's proceed to step 16:
The number 221 fits into 940 4 times, leaving a remainder of 56.
Use 4 as the next digit of our solution. 
Result so far: 323334.05429864
Subtract 884 from 940 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Our division results in 323334.05429864 with a remaining 5.6e-08.