929372 ÷ 21 
The aim is to understand the frequency of 21 in 929372.

Let's proceed to step 1:
The number 21 fits into 9 0 times, leaving a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Append the next digit (2) from the dividend to 9 and continue with: 92 / 21

On to step 2:
21 can be fit into 92 4 times, resulting in a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Deduct 84 from 92 and we're left with 8.
Bring next digit (9) of the dividend behind the 8 and repeat the process: 89 / 21

On to step 3:
If we divide 89 by 21, we get 4 and a remainder of 5.
Use 4 as the next digit of our solution. 
Result so far: 44.0
Subtracting 84 from 89 leaves us with 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 21

Step 4:
The number 21 fits into 53 2 times, leaving a remainder of 11.
Use 2 as the next digit of our solution. 
Result so far: 442.0
If we take 42 away from 53, we end up with 11.
Fetch the next digit (7) from the dividend, attach it to 11 and continue: 117 / 21

On to step 5:
21 goes into 117 5 times with a remainder of 12.
The number 5 becomes the next digit in our result. 
Result so far: 4425.0
Subtract 105 from 117 to get 12.
Bring next digit (2) of the dividend behind the 12 and repeat the process: 122 / 21

Step 6:
21 goes into 122 5 times with a remainder of 17.
The number 5 becomes the next digit in our result. 
Result so far: 44255.0
Subtract 105 from 122 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 7:
21 goes into 170 8 times with a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 44255.8
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.

Advancing to step 8:
The number 21 fits into 20 0 times, leaving a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 44255.8
Subtracting 0 from 20 leaves us 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.

Step 9:
When dividing 200 by 21, we get 9 with a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 44255.809
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.

Moving on to step 10:
If we divide 110 by 21, we get 5 and a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 44255.8095
Subtract 105 from 110 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 11:
21 can be fit into 50 2 times, resulting in a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 44255.80952
If we take 42 away from 50, 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.

Moving on to step 12:
21 goes into 80 3 times with a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 44255.809523
If we take 63 away from 80, we end up 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.

Going ahead to step 13:
21 goes into 170 8 times with a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 44255.8095238
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 14:
21 can be fit into 20 0 times, resulting in a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 44255.8095238
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.

Our division results in 44255.8095238 with a remaining 2e-08.