20898692 ÷ 421 
The aim is to understand the frequency of 421 in 20898692.

Let's proceed to step 1:
The number 421 fits into 2 0 times, leaving a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Fetch the next digit (0) from the dividend, attach it to 2 and continue: 20 / 421

Let's proceed to step 2:
When dividing 20 by 421, we get 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 20, we end up with 20.
Append the next digit (8) from the dividend to 20 and continue with: 208 / 421

Step 3:
421 goes into 208 0 times with a remainder of 208.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 208 and we're left with 208.
Append the next digit (9) from the dividend to 208 and continue with: 2089 / 421

Going ahead to step 4:
421 goes into 2089 4 times with a remainder of 405.
The next digit of our result is 4. 
Result so far: 4.0
If we take 1684 away from 2089, we end up with 405.
Append the next digit (8) from the dividend to 405 and continue with: 4058 / 421

Step 5:
4058 divided by 421 is 9 with a remainder of 269.
Put 9 as the next digit of the answer. 
Result so far: 49.0
The remainder is 269 after subtracting 3789 from 4058.
Grab the next digit (6) from the dividend, add it to 269, then carry on: 2696 / 421

Let's proceed to step 6:
421 goes into 2696 6 times with a remainder of 170.
Record the quotient 6 as the next digit in the result. 
Result so far: 496.0
Subtracting 2526 from 2696 leaves us with 170.
Bring next digit (9) of the dividend behind the 170 and repeat the process: 1709 / 421

Let's proceed to step 7:
The number 421 fits into 1709 4 times, leaving a remainder of 25.
Write down 4 as next digit of the result. 
Result so far: 4964.0
Subtracting 1684 from 1709 leaves us with 25.
Grab the next digit (2) from the dividend, add it to 25, then carry on: 252 / 421

Step 8:
252 divided by 421 is 0 with a remainder of 252.
Record the quotient 0 as the next digit in the result. 
Result so far: 49640.0
Subtracting 0 from 252 leaves us with 252.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

Advancing to step 9:
When dividing 2520 by 421, we get 5 with a remainder of 415.
Write down 5 as next digit of the result. 
Result so far: 49640.5
Deduct 2105 from 2520 and we're left with 415.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4150, and continue the process.

On to step 10:
421 can be fit into 4150 9 times, resulting in a remainder of 361.
Record the quotient 9 as the next digit in the result. 
Result so far: 49640.59
If we subtract 3789 from 4150, we get 361.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3610, and continue the process.

Step 11:
421 goes into 3610 8 times with a remainder of 242.
Write down 8 as next digit of the result. 
Result so far: 49640.598
If we subtract 3368 from 3610, we get 242.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2420, and continue the process.

Moving on to step 12:
The number 421 fits into 2420 5 times, leaving a remainder of 315.
Record the quotient 5 as the next digit in the result. 
Result so far: 49640.5985
Subtracting 2105 from 2420 leaves us with 315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

Moving on to step 13:
3150 divided by 421 is 7 with a remainder of 203.
Use 7 as the next digit of our solution. 
Result so far: 49640.59857
Subtracting 2947 from 3150 leaves us with 203.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2030, and continue the process.

Going ahead to step 14:
The number 421 fits into 2030 4 times, leaving a remainder of 346.
Record the quotient 4 as the next digit in the result. 
Result so far: 49640.598574
Deduct 1684 from 2030 and we're left with 346.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3460, and continue the process.

Going ahead to step 15:
The number 421 fits into 3460 8 times, leaving a remainder of 92.
The next digit of our result is 8. 
Result so far: 49640.5985748
If we take 3368 away from 3460, we end up with 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Going ahead to step 16:
When dividing 920 by 421, we get 2 with a remainder of 78.
Record the quotient 2 as the next digit in the result. 
Result so far: 49640.59857482
Subtract 842 from 920 to get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

After the division, we end up with 49640.59857482 and a remainder of 7.8e-08.