We look at the division of 21325629 by 811 
The aim is to understand the frequency of 811 in 21325629.

Going ahead to step 1:
811 goes into 2 0 times with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 811

Advancing to step 2:
When dividing 21 by 811, we get 0 with a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Fetch the next digit (3) from the dividend, attach it to 21 and continue: 213 / 811

Moving on to step 3:
213 divided by 811 is 0 with a remainder of 213.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 213, we get 213.
Grab the next digit (2) from the dividend, add it to 213, then carry on: 2132 / 811

Going ahead to step 4:
2132 divided by 811 is 2 with a remainder of 510.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 1622 from 2132, we get 510.
Take the next digit (5) from the dividend and append it to 510, then repeat: 5105 / 811

On to step 5:
5105 divided by 811 is 6 with a remainder of 239.
Use 6 as the next digit of our solution. 
Result so far: 26.0
The remainder is 239 after subtracting 4866 from 5105.
Append the next digit (6) from the dividend to 239 and continue with: 2396 / 811

Let's proceed to step 6:
The number 811 fits into 2396 2 times, leaving a remainder of 774.
The next digit of our result is 2. 
Result so far: 262.0
Deduct 1622 from 2396 and we're left with 774.
Bring next digit (2) of the dividend behind the 774 and repeat the process: 7742 / 811

On to step 7:
811 goes into 7742 9 times with a remainder of 443.
The next digit of our result is 9. 
Result so far: 2629.0
Subtract 7299 from 7742 to get 443.
Include the next digit (9) from the dividend after 443, then repeat: 4439 / 811

Advancing to step 8:
When dividing 4439 by 811, we get 5 with a remainder of 384.
The number 5 becomes the next digit in our result. 
Result so far: 26295.0
The remainder is 384 after subtracting 4055 from 4439.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

Step 9:
When dividing 3840 by 811, we get 4 with a remainder of 596.
The next digit of our result is 4. 
Result so far: 26295.4
Deduct 3244 from 3840 and we're left with 596.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5960, and continue the process.

Step 10:
811 can be fit into 5960 7 times, resulting in a remainder of 283.
Use 7 as the next digit of our solution. 
Result so far: 26295.47
Subtract 5677 from 5960 to get 283.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2830, and continue the process.

Moving on to step 11:
If we divide 2830 by 811, we get 3 and a remainder of 397.
Record the quotient 3 as the next digit in the result. 
Result so far: 26295.473
Subtracting 2433 from 2830 leaves us with 397.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3970, and continue the process.

Moving on to step 12:
The number 811 fits into 3970 4 times, leaving a remainder of 726.
The number 4 becomes the next digit in our result. 
Result so far: 26295.4734
Subtract 3244 from 3970 to get 726.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7260, and continue the process.

Let's proceed to step 13:
7260 divided by 811 is 8 with a remainder of 772.
Put 8 as the next digit of the answer. 
Result so far: 26295.47348
The remainder is 772 after subtracting 6488 from 7260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7720, and continue the process.

Advancing to step 14:
If we divide 7720 by 811, we get 9 and a remainder of 421.
Use 9 as the next digit of our solution. 
Result so far: 26295.473489
The remainder is 421 after subtracting 7299 from 7720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4210, and continue the process.

Advancing to step 15:
4210 divided by 811 is 5 with a remainder of 155.
Write down 5 as next digit of the result. 
Result so far: 26295.4734895
Subtracting 4055 from 4210 leaves us with 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

Going ahead to step 16:
811 can be fit into 1550 1 times, resulting in a remainder of 739.
The next digit of our result is 1. 
Result so far: 26295.47348951
Deduct 811 from 1550 and we're left with 739.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7390, and continue the process.

The quotient of the division is 26295.47348951, and the remainder is 7.39e-07.