Let's divide 606467 by 21
The aim is to understand the frequency of 21 in 606467.

On to step 1:
When dividing 6 by 21, we get 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (0) from the dividend, add it to 6, then carry on: 60 / 21

Step 2:
The number 21 fits into 60 2 times, leaving a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we take 42 away from 60, we end up with 18.
Fetch the next digit (6) from the dividend, attach it to 18 and continue: 186 / 21

Advancing to step 3:
If we divide 186 by 21, we get 8 and a remainder of 18.
Put 8 as the next digit of the answer. 
Result so far: 28.0
Subtracting 168 from 186 leaves us with 18.
Bring next digit (4) of the dividend behind the 18 and repeat the process: 184 / 21

Moving on to step 4:
If we divide 184 by 21, we get 8 and a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 288.0
If we take 168 away from 184, we end up with 16.
Fetch the next digit (6) from the dividend, attach it to 16 and continue: 166 / 21

Advancing to step 5:
21 goes into 166 7 times with a remainder of 19.
Use 7 as the next digit of our solution. 
Result so far: 2887.0
If we subtract 147 from 166, we get 19.
Take the next digit (7) from the dividend and append it to 19, then repeat: 197 / 21

On to step 6:
197 divided by 21 is 9 with a remainder of 8.
The number 9 becomes the next digit in our result. 
Result so far: 28879.0
If we take 189 away from 197, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 7:
When dividing 80 by 21, we get 3 with a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 28879.3
If we subtract 63 from 80, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 8:
170 divided by 21 is 8 with a remainder of 2.
The next digit of our result is 8. 
Result so far: 28879.38
The remainder is 2 after subtracting 168 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 9:
The number 21 fits into 20 0 times, leaving a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 28879.38
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 10:
21 can be fit into 200 9 times, resulting in a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 28879.3809
If we take 189 away from 200, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 11:
21 can be fit into 110 5 times, resulting in a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 28879.38095
Deduct 105 from 110 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 12:
21 goes into 50 2 times with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 28879.380952
If we subtract 42 from 50, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 13:
21 goes into 80 3 times with a remainder of 17.
The next digit of our result is 3. 
Result so far: 28879.3809523
Subtracting 63 from 80 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 14:
The number 21 fits into 170 8 times, leaving a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 28879.38095238
If we subtract 168 from 170, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The quotient of the division is 28879.38095238, and the remainder is 2e-09.