We divide 98689031 by 21
The aim is to understand the frequency of 21 in 98689031.

On to step 1:
If we divide 9 by 21, we get 0 and a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Take the next digit (8) from the dividend and append it to 9, then repeat: 98 / 21

Let's proceed to step 2:
If we divide 98 by 21, we get 4 and a remainder of 14.
Put 4 as the next digit of the answer. 
Result so far: 4.0
The remainder is 14 after subtracting 84 from 98.
Include the next digit (6) from the dividend after 14, then repeat: 146 / 21

Step 3:
When dividing 146 by 21, we get 6 with a remainder of 20.
The number 6 becomes the next digit in our result. 
Result so far: 46.0
If we take 126 away from 146, we end up with 20.
Fetch the next digit (8) from the dividend, attach it to 20 and continue: 208 / 21

On to step 4:
When dividing 208 by 21, we get 9 with a remainder of 19.
Write down 9 as next digit of the result. 
Result so far: 469.0
Deduct 189 from 208 and we're left with 19.
Fetch the next digit (9) from the dividend, attach it to 19 and continue: 199 / 21

Advancing to step 5:
21 can be fit into 199 9 times, resulting in a remainder of 10.
Record the quotient 9 as the next digit in the result. 
Result so far: 4699.0
If we take 189 away from 199, we end up with 10.
Include the next digit (0) from the dividend after 10, then repeat: 100 / 21

Going ahead to step 6:
When dividing 100 by 21, we get 4 with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 46994.0
Subtracting 84 from 100 leaves us with 16.
Include the next digit (3) from the dividend after 16, then repeat: 163 / 21

Step 7:
The number 21 fits into 163 7 times, leaving a remainder of 16.
Write down 7 as next digit of the result. 
Result so far: 469947.0
Subtract 147 from 163 to get 16.
Grab the next digit (1) from the dividend, add it to 16, then carry on: 161 / 21

Moving on to step 8:
21 can be fit into 161 7 times, resulting in a remainder of 14.
Use 7 as the next digit of our solution. 
Result so far: 4699477.0
The remainder is 14 after subtracting 147 from 161.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 9:
If we divide 140 by 21, we get 6 and a remainder of 14.
The next digit of our result is 6. 
Result so far: 4699477.6
Subtracting 126 from 140 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 10:
21 goes into 140 6 times with a remainder of 14.
The number 6 becomes the next digit in our result. 
Result so far: 4699477.66
If we take 126 away from 140, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

In conclusion, the division gives 4699477.66 with a balance of 0.014.