Let's divide 746869 by 21
The aim is to understand the frequency of 21 in 746869.

Let's proceed to step 1:
If we divide 7 by 21, we get 0 and a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Bring next digit (4) of the dividend behind the 7 and repeat the process: 74 / 21

Moving on to step 2:
21 can be fit into 74 3 times, resulting in a remainder of 11.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we subtract 63 from 74, we get 11.
Include the next digit (6) from the dividend after 11, then repeat: 116 / 21

Step 3:
21 can be fit into 116 5 times, resulting in a remainder of 11.
The number 5 becomes the next digit in our result. 
Result so far: 35.0
If we take 105 away from 116, we end up with 11.
Bring next digit (8) of the dividend behind the 11 and repeat the process: 118 / 21

Step 4:
21 goes into 118 5 times with a remainder of 13.
The number 5 becomes the next digit in our result. 
Result so far: 355.0
If we subtract 105 from 118, we get 13.
Take the next digit (6) from the dividend and append it to 13, then repeat: 136 / 21

On to step 5:
21 goes into 136 6 times with a remainder of 10.
The next digit of our result is 6. 
Result so far: 3556.0
Subtract 126 from 136 to get 10.
Include the next digit (9) from the dividend after 10, then repeat: 109 / 21

On to step 6:
21 can be fit into 109 5 times, resulting in a remainder of 4.
Put 5 as the next digit of the answer. 
Result so far: 35565.0
If we take 105 away from 109, we end up with 4.
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 7:
When dividing 40 by 21, we get 1 with a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 35565.1
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.

Moving on to step 8:
190 divided by 21 is 9 with a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 35565.19
If we take 189 away from 190, we end up 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.

Advancing to step 9:
If we divide 10 by 21, we get 0 and a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 35565.19
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.

Let's proceed to step 10:
When dividing 100 by 21, we get 4 with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 35565.1904
The remainder is 16 after subtracting 84 from 100.
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 11:
160 divided by 21 is 7 with a remainder of 13.
The next digit of our result is 7. 
Result so far: 35565.19047
Subtracting 147 from 160 leaves us 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.

Let's proceed to step 12:
130 divided by 21 is 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 35565.190476
Subtract 126 from 130 to 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.

Step 13:
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: 35565.1904761
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.

On to step 14:
190 divided by 21 is 9 with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 35565.19047619
Subtracting 189 from 190 leaves us 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.

Our division results in 35565.19047619 with a remaining 1e-09.