Let's divide 16298691 by 221
The aim is to understand the frequency of 221 in 16298691.

Let's proceed to step 1:
The number 221 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Append the next digit (6) from the dividend to 1 and continue with: 16 / 221

Let's proceed to step 2:
16 divided by 221 is 0 with a remainder of 16.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 16, we get 16.
Fetch the next digit (2) from the dividend, attach it to 16 and continue: 162 / 221

Step 3:
162 divided by 221 is 0 with a remainder of 162.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 162 to get 162.
Fetch the next digit (9) from the dividend, attach it to 162 and continue: 1629 / 221

Advancing to step 4:
If we divide 1629 by 221, we get 7 and a remainder of 82.
Write down 7 as next digit of the result. 
Result so far: 7.0
Deduct 1547 from 1629 and we're left with 82.
Include the next digit (8) from the dividend after 82, then repeat: 828 / 221

Let's proceed to step 5:
The number 221 fits into 828 3 times, leaving a remainder of 165.
Record the quotient 3 as the next digit in the result. 
Result so far: 73.0
If we subtract 663 from 828, we get 165.
Include the next digit (6) from the dividend after 165, then repeat: 1656 / 221

On to step 6:
221 can be fit into 1656 7 times, resulting in a remainder of 109.
The number 7 becomes the next digit in our result. 
Result so far: 737.0
Subtracting 1547 from 1656 leaves us with 109.
Fetch the next digit (9) from the dividend, attach it to 109 and continue: 1099 / 221

Going ahead to step 7:
When dividing 1099 by 221, we get 4 with a remainder of 215.
Write down 4 as next digit of the result. 
Result so far: 7374.0
Deduct 884 from 1099 and we're left with 215.
Bring next digit (1) of the dividend behind the 215 and repeat the process: 2151 / 221

Let's proceed to step 8:
221 can be fit into 2151 9 times, resulting in a remainder of 162.
Use 9 as the next digit of our solution. 
Result so far: 73749.0
Subtract 1989 from 2151 to get 162.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

Going ahead to step 9:
1620 divided by 221 is 7 with a remainder of 73.
The number 7 becomes the next digit in our result. 
Result so far: 73749.7
Deduct 1547 from 1620 and we're left with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Let's proceed to step 10:
When dividing 730 by 221, we get 3 with a remainder of 67.
Write down 3 as next digit of the result. 
Result so far: 73749.73
The remainder is 67 after subtracting 663 from 730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Step 11:
670 divided by 221 is 3 with a remainder of 7.
The next digit of our result is 3. 
Result so far: 73749.733
Subtract 663 from 670 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

After the division, we end up with 73749.733 and a remainder of 0.0007.