Let's divide 976594 by 21
The aim is to understand the frequency of 21 in 976594.

Going ahead to step 1:
9 divided by 21 is 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Append the next digit (7) from the dividend to 9 and continue with: 97 / 21

Moving on to step 2:
97 divided by 21 is 4 with a remainder of 13.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtracting 84 from 97 leaves us with 13.
Append the next digit (6) from the dividend to 13 and continue with: 136 / 21

Advancing to step 3:
21 goes into 136 6 times with a remainder of 10.
The next digit of our result is 6. 
Result so far: 46.0
Subtracting 126 from 136 leaves us with 10.
Take the next digit (5) from the dividend and append it to 10, then repeat: 105 / 21

Moving on to step 4:
21 can be fit into 105 5 times, resulting in a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 465.0
The remainder is 0 after subtracting 105 from 105.
Include the next digit (9) from the dividend after 0, then repeat: 9 / 21

On to step 5:
9 divided by 21 is 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 4650.0
Subtract 0 from 9 to get 9.
Bring next digit (4) of the dividend behind the 9 and repeat the process: 94 / 21

On to step 6:
94 divided by 21 is 4 with a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 46504.0
The remainder is 10 after subtracting 84 from 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 7:
If we divide 100 by 21, we get 4 and a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 46504.4
If we subtract 84 from 100, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 8:
The number 21 fits into 160 7 times, leaving a remainder of 13.
The next digit of our result is 7. 
Result so far: 46504.47
Subtract 147 from 160 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 9:
When dividing 130 by 21, we get 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 46504.476
If we subtract 126 from 130, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 10:
If we divide 40 by 21, we get 1 and a remainder of 19.
The next digit of our result is 1. 
Result so far: 46504.4761
Subtract 21 from 40 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.

Advancing to step 11:
When dividing 190 by 21, we get 9 with a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 46504.47619
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.

Moving on to step 12:
10 divided by 21 is 0 with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 46504.47619
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 13:
100 divided by 21 is 4 with a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 46504.4761904
Subtract 84 from 100 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 14:
The number 21 fits into 160 7 times, leaving a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 46504.47619047
If we take 147 away from 160, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

In conclusion, the division gives 46504.47619047 with a balance of 1.3e-08.