We look at the division of 89191945 by 221 
The aim is to understand the frequency of 221 in 89191945.

Let's proceed to step 1:
When dividing 8 by 221, we get 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Append the next digit (9) from the dividend to 8 and continue with: 89 / 221

Going ahead to step 2:
When dividing 89 by 221, we get 0 with a remainder of 89.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 89, we get 89.
Bring next digit (1) of the dividend behind the 89 and repeat the process: 891 / 221

Step 3:
When dividing 891 by 221, we get 4 with a remainder of 7.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtract 884 from 891 to get 7.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 221

Advancing to step 4:
221 goes into 79 0 times with a remainder of 79.
Record the quotient 0 as the next digit in the result. 
Result so far: 40.0
If we subtract 0 from 79, we get 79.
Append the next digit (1) from the dividend to 79 and continue with: 791 / 221

Step 5:
221 can be fit into 791 3 times, resulting in a remainder of 128.
The next digit of our result is 3. 
Result so far: 403.0
If we subtract 663 from 791, we get 128.
Grab the next digit (9) from the dividend, add it to 128, then carry on: 1289 / 221

Advancing to step 6:
The number 221 fits into 1289 5 times, leaving a remainder of 184.
The number 5 becomes the next digit in our result. 
Result so far: 4035.0
Subtracting 1105 from 1289 leaves us with 184.
Bring next digit (4) of the dividend behind the 184 and repeat the process: 1844 / 221

Going ahead to step 7:
1844 divided by 221 is 8 with a remainder of 76.
The number 8 becomes the next digit in our result. 
Result so far: 40358.0
Subtracting 1768 from 1844 leaves us with 76.
Include the next digit (5) from the dividend after 76, then repeat: 765 / 221

Advancing to step 8:
When dividing 765 by 221, we get 3 with a remainder of 102.
The next digit of our result is 3. 
Result so far: 403583.0
If we take 663 away from 765, we end up with 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Advancing to step 9:
221 can be fit into 1020 4 times, resulting in a remainder of 136.
Use 4 as the next digit of our solution. 
Result so far: 403583.4
Subtract 884 from 1020 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.

Advancing to step 10:
221 goes into 1360 6 times with a remainder of 34.
Record the quotient 6 as the next digit in the result. 
Result so far: 403583.46
Subtract 1326 from 1360 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Let's proceed to step 11:
340 divided by 221 is 1 with a remainder of 119.
Record the quotient 1 as the next digit in the result. 
Result so far: 403583.461
The remainder is 119 after subtracting 221 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1190, and continue the process.

Advancing to step 12:
When dividing 1190 by 221, we get 5 with a remainder of 85.
Write down 5 as next digit of the result. 
Result so far: 403583.4615
Subtracting 1105 from 1190 leaves us with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

On to step 13:
221 goes into 850 3 times with a remainder of 187.
The next digit of our result is 3. 
Result so far: 403583.46153
Subtracting 663 from 850 leaves us with 187.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1870, and continue the process.

Going ahead to step 14:
The number 221 fits into 1870 8 times, leaving a remainder of 102.
Write down 8 as next digit of the result. 
Result so far: 403583.461538
Subtract 1768 from 1870 to get 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Advancing to step 15:
When dividing 1020 by 221, we get 4 with a remainder of 136.
Write down 4 as next digit of the result. 
Result so far: 403583.4615384
If we subtract 884 from 1020, we 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.

On to step 16:
221 goes into 1360 6 times with a remainder of 34.
Record the quotient 6 as the next digit in the result. 
Result so far: 403583.46153846
The remainder is 34 after subtracting 1326 from 1360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Our division results in 403583.46153846 with a remaining 3.4e-08.