926606 divided by 21 
The aim is to understand the frequency of 21 in 926606.

Moving on to step 1:
If we divide 9 by 21, we get 0 and a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Grab the next digit (2) from the dividend, add it to 9, then carry on: 92 / 21

Let's proceed to step 2:
92 divided by 21 is 4 with a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtract 84 from 92 to get 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 21

Going ahead to step 3:
The number 21 fits into 86 4 times, leaving a remainder of 2.
Write down 4 as next digit of the result. 
Result so far: 44.0
If we take 84 away from 86, we end up with 2.
Fetch the next digit (6) from the dividend, attach it to 2 and continue: 26 / 21

On to step 4:
The number 21 fits into 26 1 times, leaving a remainder of 5.
Use 1 as the next digit of our solution. 
Result so far: 441.0
Subtract 21 from 26 to get 5.
Fetch the next digit (0) from the dividend, attach it to 5 and continue: 50 / 21

Moving on to step 5:
21 can be fit into 50 2 times, resulting in a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 4412.0
Deduct 42 from 50 and we're left with 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 21

Going ahead to step 6:
21 goes into 86 4 times with a remainder of 2.
The next digit of our result is 4. 
Result so far: 44124.0
If we subtract 84 from 86, 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.

Step 7:
When dividing 20 by 21, we get 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 44124.0
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 8:
200 divided by 21 is 9 with a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 44124.09
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.

Let's proceed to step 9:
If we divide 110 by 21, we get 5 and a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 44124.095
If we take 105 away from 110, we end up 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.

Moving on to step 10:
The number 21 fits into 50 2 times, leaving a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 44124.0952
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 11:
21 goes into 80 3 times with a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 44124.09523
Subtract 63 from 80 to 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 12:
The number 21 fits into 170 8 times, leaving a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 44124.095238
If we take 168 away from 170, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 13:
If we divide 20 by 21, we get 0 and a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 44124.095238
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.

Let's proceed to step 14:
If we divide 200 by 21, we get 9 and a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 44124.09523809
If we subtract 189 from 200, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

After the division, we end up with 44124.09523809 and a remainder of 1.1e-08.