936766 ÷ 21 
The aim is to understand the frequency of 21 in 936766.

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
Deduct 0 from 9 and we're left with 9.
Fetch the next digit (3) from the dividend, attach it to 9 and continue: 93 / 21

Moving on to step 2:
The number 21 fits into 93 4 times, leaving a remainder of 9.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 9 after subtracting 84 from 93.
Bring next digit (6) of the dividend behind the 9 and repeat the process: 96 / 21

Advancing to step 3:
When dividing 96 by 21, we get 4 with a remainder of 12.
Write down 4 as next digit of the result. 
Result so far: 44.0
The remainder is 12 after subtracting 84 from 96.
Include the next digit (7) from the dividend after 12, then repeat: 127 / 21

Moving on to step 4:
The number 21 fits into 127 6 times, leaving a remainder of 1.
Use 6 as the next digit of our solution. 
Result so far: 446.0
The remainder is 1 after subtracting 126 from 127.
Fetch the next digit (6) from the dividend, attach it to 1 and continue: 16 / 21

Going ahead to step 5:
16 divided by 21 is 0 with a remainder of 16.
Put 0 as the next digit of the answer. 
Result so far: 4460.0
Deduct 0 from 16 and we're left with 16.
Grab the next digit (6) from the dividend, add it to 16, then carry on: 166 / 21

Let's proceed to step 6:
When dividing 166 by 21, we get 7 with a remainder of 19.
The next digit of our result is 7. 
Result so far: 44607.0
Subtract 147 from 166 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.

Let's proceed to step 7:
190 divided by 21 is 9 with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 44607.9
Deduct 189 from 190 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 8:
10 divided by 21 is 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 44607.9
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.

Advancing to step 9:
The number 21 fits into 100 4 times, leaving a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 44607.904
If we take 84 away from 100, we end up 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.

Moving on to step 10:
The number 21 fits into 160 7 times, leaving a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 44607.9047
The remainder is 13 after subtracting 147 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 11:
If we divide 130 by 21, we get 6 and a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 44607.90476
The remainder is 4 after subtracting 126 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 12:
40 divided by 21 is 1 with a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 44607.904761
The remainder is 19 after subtracting 21 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 13:
If we divide 190 by 21, we get 9 and a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 44607.9047619
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.

Moving on to step 14:
The number 21 fits into 10 0 times, leaving a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 44607.9047619
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.

In conclusion, the division gives 44607.9047619 with a balance of 1e-08.