We look at the division of 13551205 by 812 
The aim is to understand the frequency of 812 in 13551205.

On to step 1:
The number 812 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 812

Going ahead to step 2:
812 can be fit into 13 0 times, resulting in a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 13 leaves us with 13.
Bring next digit (5) of the dividend behind the 13 and repeat the process: 135 / 812

On to step 3:
812 goes into 135 0 times with a remainder of 135.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 135 and we're left with 135.
Append the next digit (5) from the dividend to 135 and continue with: 1355 / 812

Let's proceed to step 4:
When dividing 1355 by 812, we get 1 with a remainder of 543.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 812 away from 1355, we end up with 543.
Fetch the next digit (1) from the dividend, attach it to 543 and continue: 5431 / 812

Advancing to step 5:
812 goes into 5431 6 times with a remainder of 559.
The number 6 becomes the next digit in our result. 
Result so far: 16.0
Subtracting 4872 from 5431 leaves us with 559.
Include the next digit (2) from the dividend after 559, then repeat: 5592 / 812

On to step 6:
If we divide 5592 by 812, we get 6 and a remainder of 720.
Record the quotient 6 as the next digit in the result. 
Result so far: 166.0
If we subtract 4872 from 5592, we get 720.
Append the next digit (0) from the dividend to 720 and continue with: 7200 / 812

On to step 7:
7200 divided by 812 is 8 with a remainder of 704.
The next digit of our result is 8. 
Result so far: 1668.0
If we subtract 6496 from 7200, we get 704.
Include the next digit (5) from the dividend after 704, then repeat: 7045 / 812

Moving on to step 8:
When dividing 7045 by 812, we get 8 with a remainder of 549.
Put 8 as the next digit of the answer. 
Result so far: 16688.0
If we subtract 6496 from 7045, we get 549.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5490, and continue the process.

Going ahead to step 9:
812 goes into 5490 6 times with a remainder of 618.
Use 6 as the next digit of our solution. 
Result so far: 16688.6
The remainder is 618 after subtracting 4872 from 5490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6180, and continue the process.

Moving on to step 10:
812 goes into 6180 7 times with a remainder of 496.
The next digit of our result is 7. 
Result so far: 16688.67
The remainder is 496 after subtracting 5684 from 6180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4960, and continue the process.

Step 11:
When dividing 4960 by 812, we get 6 with a remainder of 88.
The next digit of our result is 6. 
Result so far: 16688.676
Deduct 4872 from 4960 and we're left with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Advancing to step 12:
When dividing 880 by 812, we get 1 with a remainder of 68.
Record the quotient 1 as the next digit in the result. 
Result so far: 16688.6761
If we subtract 812 from 880, we get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Going ahead to step 13:
680 divided by 812 is 0 with a remainder of 680.
Use 0 as the next digit of our solution. 
Result so far: 16688.6761
The remainder is 680 after subtracting 0 from 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6800, and continue the process.

Let's proceed to step 14:
When dividing 6800 by 812, we get 8 with a remainder of 304.
Record the quotient 8 as the next digit in the result. 
Result so far: 16688.676108
Deduct 6496 from 6800 and we're left with 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Going ahead to step 15:
When dividing 3040 by 812, we get 3 with a remainder of 604.
The next digit of our result is 3. 
Result so far: 16688.6761083
Subtracting 2436 from 3040 leaves us with 604.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6040, and continue the process.

Going ahead to step 16:
812 goes into 6040 7 times with a remainder of 356.
Record the quotient 7 as the next digit in the result. 
Result so far: 16688.67610837
The remainder is 356 after subtracting 5684 from 6040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

The final outcome is 16688.67610837, with a leftover of 3.56e-07.