811344 divided by 13 
The aim is to understand the frequency of 13 in 811344.

On to step 1:
8 divided by 13 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 13

Moving on to step 2:
81 divided by 13 is 6 with a remainder of 3.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Subtracting 78 from 81 leaves us with 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 13

Advancing to step 3:
13 can be fit into 31 2 times, resulting in a remainder of 5.
Use 2 as the next digit of our solution. 
Result so far: 62.0
Subtracting 26 from 31 leaves us with 5.
Grab the next digit (3) from the dividend, add it to 5, then carry on: 53 / 13

Step 4:
13 can be fit into 53 4 times, resulting in a remainder of 1.
Use 4 as the next digit of our solution. 
Result so far: 624.0
If we subtract 52 from 53, we get 1.
Take the next digit (4) from the dividend and append it to 1, then repeat: 14 / 13

Step 5:
When dividing 14 by 13, we get 1 with a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 6241.0
If we take 13 away from 14, we end up with 1.
Fetch the next digit (4) from the dividend, attach it to 1 and continue: 14 / 13

Moving on to step 6:
When dividing 14 by 13, we get 1 with a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 62411.0
Subtracting 13 from 14 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.

Step 7:
If we divide 10 by 13, we get 0 and a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 62411.0
Deduct 0 from 10 and we're left 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 8:
If we divide 100 by 13, we get 7 and a remainder of 9.
The next digit of our result is 7. 
Result so far: 62411.07
If we take 91 away from 100, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 9:
90 divided by 13 is 6 with a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 62411.076
Subtract 78 from 90 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 10:
The number 13 fits into 120 9 times, leaving a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 62411.0769
Subtract 117 from 120 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 11:
The number 13 fits into 30 2 times, leaving a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 62411.07692
If we take 26 away from 30, 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.

Moving on to step 12:
If we divide 40 by 13, we get 3 and a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 62411.076923
If we subtract 39 from 40, we get 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 13:
When dividing 10 by 13, we get 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 62411.076923
Deduct 0 from 10 and we're left 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 14:
13 goes into 100 7 times with a remainder of 9.
Record the quotient 7 as the next digit in the result. 
Result so far: 62411.07692307
If we take 91 away from 100, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Our division results in 62411.07692307 with a remaining 9e-09.