We look at the division of 352793 by 13 
The aim is to understand the frequency of 13 in 352793.

Step 1:
When dividing 3 by 13, we get 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Take the next digit (5) from the dividend and append it to 3, then repeat: 35 / 13

Going ahead to step 2:
The number 13 fits into 35 2 times, leaving a remainder of 9.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 26 from 35 and we're left with 9.
Take the next digit (2) from the dividend and append it to 9, then repeat: 92 / 13

Step 3:
When dividing 92 by 13, we get 7 with a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 27.0
Subtract 91 from 92 to get 1.
Fetch the next digit (7) from the dividend, attach it to 1 and continue: 17 / 13

On to step 4:
13 can be fit into 17 1 times, resulting in a remainder of 4.
The next digit of our result is 1. 
Result so far: 271.0
Subtracting 13 from 17 leaves us with 4.
Take the next digit (9) from the dividend and append it to 4, then repeat: 49 / 13

On to step 5:
13 can be fit into 49 3 times, resulting in a remainder of 10.
Write down 3 as next digit of the result. 
Result so far: 2713.0
Deduct 39 from 49 and we're left with 10.
Take the next digit (3) from the dividend and append it to 10, then repeat: 103 / 13

Step 6:
103 divided by 13 is 7 with a remainder of 12.
The number 7 becomes the next digit in our result. 
Result so far: 27137.0
Subtracting 91 from 103 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 7:
When dividing 120 by 13, we get 9 with a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 27137.9
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 8:
13 can be fit into 30 2 times, resulting in a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 27137.92
The remainder is 4 after subtracting 26 from 30.
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 9:
40 divided by 13 is 3 with a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 27137.923
If we take 39 away from 40, 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 10:
The number 13 fits into 10 0 times, leaving a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 27137.923
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 11:
The number 13 fits into 100 7 times, leaving a remainder of 9.
Write down 7 as next digit of the result. 
Result so far: 27137.92307
Subtracting 91 from 100 leaves us 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.

On to step 12:
13 goes into 90 6 times with a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 27137.923076
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 13:
The number 13 fits into 120 9 times, leaving a remainder of 3.
Record the quotient 9 as the next digit in the result. 
Result so far: 27137.9230769
If we subtract 117 from 120, we 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 14:
30 divided by 13 is 2 with a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 27137.92307692
Subtracting 26 from 30 leaves us 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.

The final result is 27137.92307692 with a remainder of 4e-09.