Let's divide 548850 by 21
The aim is to understand the frequency of 21 in 548850.

Moving on to step 1:
21 can be fit into 5 0 times, resulting in a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (4) from the dividend and append it to 5, then repeat: 54 / 21

Let's proceed to step 2:
21 can be fit into 54 2 times, resulting in a remainder of 12.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 42 from 54 and we're left with 12.
Fetch the next digit (8) from the dividend, attach it to 12 and continue: 128 / 21

Moving on to step 3:
21 can be fit into 128 6 times, resulting in a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 26.0
Deduct 126 from 128 and we're left with 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 21

Advancing to step 4:
When dividing 28 by 21, we get 1 with a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 261.0
If we take 21 away from 28, we end up with 7.
Take the next digit (5) from the dividend and append it to 7, then repeat: 75 / 21

Moving on to step 5:
If we divide 75 by 21, we get 3 and a remainder of 12.
Put 3 as the next digit of the answer. 
Result so far: 2613.0
If we take 63 away from 75, we end up with 12.
Append the next digit (0) from the dividend to 12 and continue with: 120 / 21

Step 6:
21 can be fit into 120 5 times, resulting in a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 26135.0
If we take 105 away from 120, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 7:
If we divide 150 by 21, we get 7 and a remainder of 3.
The next digit of our result is 7. 
Result so far: 26135.7
Subtracting 147 from 150 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 8:
If we divide 30 by 21, we get 1 and a remainder of 9.
Write down 1 as next digit of the result. 
Result so far: 26135.71
If we take 21 away from 30, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 9:
90 divided by 21 is 4 with a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 26135.714
The remainder is 6 after subtracting 84 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 10:
When dividing 60 by 21, we get 2 with a remainder of 18.
The next digit of our result is 2. 
Result so far: 26135.7142
Deduct 42 from 60 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 11:
The number 21 fits into 180 8 times, leaving a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 26135.71428
Subtracting 168 from 180 leaves us with 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 12:
21 can be fit into 120 5 times, resulting in a remainder of 15.
The next digit of our result is 5. 
Result so far: 26135.714285
Deduct 105 from 120 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 13:
When dividing 150 by 21, we get 7 with a remainder of 3.
The next digit of our result is 7. 
Result so far: 26135.7142857
Subtracting 147 from 150 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 14:
The number 21 fits into 30 1 times, leaving a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 26135.71428571
The remainder is 9 after subtracting 21 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

After the division, we end up with 26135.71428571 and a remainder of 9e-09.