We divide 162633 by 21
The aim is to understand the frequency of 21 in 162633.

Let's proceed to step 1:
21 can be fit into 1 0 times, resulting in a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 21

Let's proceed to step 2:
21 goes into 16 0 times with a remainder of 16.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 16 leaves us with 16.
Take the next digit (2) from the dividend and append it to 16, then repeat: 162 / 21

Moving on to step 3:
21 can be fit into 162 7 times, resulting in a remainder of 15.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
The remainder is 15 after subtracting 147 from 162.
Take the next digit (6) from the dividend and append it to 15, then repeat: 156 / 21

On to step 4:
21 goes into 156 7 times with a remainder of 9.
Write down 7 as next digit of the result. 
Result so far: 77.0
If we subtract 147 from 156, we get 9.
Take the next digit (3) from the dividend and append it to 9, then repeat: 93 / 21

Step 5:
The number 21 fits into 93 4 times, leaving a remainder of 9.
The next digit of our result is 4. 
Result so far: 774.0
If we subtract 84 from 93, we get 9.
Append the next digit (3) from the dividend to 9 and continue with: 93 / 21

Moving on to step 6:
21 can be fit into 93 4 times, resulting in a remainder of 9.
The number 4 becomes the next digit in our result. 
Result so far: 7744.0
The remainder is 9 after subtracting 84 from 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 7:
The number 21 fits into 90 4 times, leaving a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 7744.4
If we take 84 away from 90, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 8:
When dividing 60 by 21, we get 2 with a remainder of 18.
Put 2 as the next digit of the answer. 
Result so far: 7744.42
If we subtract 42 from 60, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 9:
If we divide 180 by 21, we get 8 and a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 7744.428
If we subtract 168 from 180, we get 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 10:
The number 21 fits into 120 5 times, leaving a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 7744.4285
If we subtract 105 from 120, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 11:
21 goes into 150 7 times with a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 7744.42857
If we subtract 147 from 150, we get 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 12:
30 divided by 21 is 1 with a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 7744.428571
Subtract 21 from 30 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 13:
The number 21 fits into 90 4 times, leaving a remainder of 6.
Put 4 as the next digit of the answer. 
Result so far: 7744.4285714
Subtracting 84 from 90 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 14:
If we divide 60 by 21, we get 2 and a remainder of 18.
Put 2 as the next digit of the answer. 
Result so far: 7744.42857142
Subtract 42 from 60 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

After the division, we end up with 7744.42857142 and a remainder of 1.8e-08.