We divide 550714 by 21
The aim is to understand the frequency of 21 in 550714.

Going ahead to step 1:
The number 21 fits into 5 0 times, leaving a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Include the next digit (5) from the dividend after 5, then repeat: 55 / 21

Moving on to step 2:
The number 21 fits into 55 2 times, leaving a remainder of 13.
The next digit of our result is 2. 
Result so far: 2.0
If we take 42 away from 55, we end up with 13.
Bring next digit (0) of the dividend behind the 13 and repeat the process: 130 / 21

On to step 3:
If we divide 130 by 21, we get 6 and a remainder of 4.
The next digit of our result is 6. 
Result so far: 26.0
If we take 126 away from 130, we end up with 4.
Include the next digit (7) from the dividend after 4, then repeat: 47 / 21

Advancing to step 4:
When dividing 47 by 21, we get 2 with a remainder of 5.
Write down 2 as next digit of the result. 
Result so far: 262.0
Subtract 42 from 47 to get 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 21

Step 5:
When dividing 51 by 21, we get 2 with a remainder of 9.
The next digit of our result is 2. 
Result so far: 2622.0
Deduct 42 from 51 and we're left with 9.
Include the next digit (4) from the dividend after 9, then repeat: 94 / 21

Let's proceed to step 6:
21 goes into 94 4 times with a remainder of 10.
Put 4 as the next digit of the answer. 
Result so far: 26224.0
The remainder is 10 after subtracting 84 from 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 7:
21 can be fit into 100 4 times, resulting in a remainder of 16.
The next digit of our result is 4. 
Result so far: 26224.4
Subtracting 84 from 100 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 8:
21 goes into 160 7 times with a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 26224.47
Subtracting 147 from 160 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 9:
21 can be fit into 130 6 times, resulting in a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 26224.476
If we subtract 126 from 130, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 10:
The number 21 fits into 40 1 times, leaving a remainder of 19.
The next digit of our result is 1. 
Result so far: 26224.4761
Subtract 21 from 40 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 11:
190 divided by 21 is 9 with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 26224.47619
The remainder is 1 after subtracting 189 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 12:
When dividing 10 by 21, we get 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 26224.47619
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 13:
21 can be fit into 100 4 times, resulting in a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 26224.4761904
Subtract 84 from 100 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 14:
160 divided by 21 is 7 with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 26224.47619047
Deduct 147 from 160 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Our division results in 26224.47619047 with a remaining 1.3e-08.