We look at the division of 14755231 by 13 
The aim is to understand the frequency of 13 in 14755231.

Step 1:
When dividing 1 by 13, we get 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Take the next digit (4) from the dividend and append it to 1, then repeat: 14 / 13

Advancing to step 2:
The number 13 fits into 14 1 times, leaving a remainder of 1.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 1 after subtracting 13 from 14.
Grab the next digit (7) from the dividend, add it to 1, then carry on: 17 / 13

Let's proceed to step 3:
13 goes into 17 1 times with a remainder of 4.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
If we take 13 away from 17, we end up with 4.
Take the next digit (5) from the dividend and append it to 4, then repeat: 45 / 13

Step 4:
If we divide 45 by 13, we get 3 and a remainder of 6.
Write down 3 as next digit of the result. 
Result so far: 113.0
Subtracting 39 from 45 leaves us with 6.
Bring next digit (5) of the dividend behind the 6 and repeat the process: 65 / 13

Let's proceed to step 5:
If we divide 65 by 13, we get 5 and a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 1135.0
If we take 65 away from 65, we end up with 0.
Bring next digit (2) of the dividend behind the 0 and repeat the process: 2 / 13

On to step 6:
13 goes into 2 0 times with a remainder of 2.
The next digit of our result is 0. 
Result so far: 11350.0
Subtracting 0 from 2 leaves us with 2.
Fetch the next digit (3) from the dividend, attach it to 2 and continue: 23 / 13

Going ahead to step 7:
13 goes into 23 1 times with a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 113501.0
Subtract 13 from 23 to get 10.
Bring next digit (1) of the dividend behind the 10 and repeat the process: 101 / 13

Step 8:
101 divided by 13 is 7 with a remainder of 10.
The number 7 becomes the next digit in our result. 
Result so far: 1135017.0
If we take 91 away from 101, we end up 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.

Step 9:
13 goes into 100 7 times with a remainder of 9.
The next digit of our result is 7. 
Result so far: 1135017.7
Subtract 91 from 100 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 10:
If we divide 90 by 13, we get 6 and a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 1135017.76
If we subtract 78 from 90, we 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 11:
If we divide 120 by 13, we get 9 and a remainder of 3.
Write down 9 as next digit of the result. 
Result so far: 1135017.769
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.

On to step 12:
13 can be fit into 30 2 times, resulting in a remainder of 4.
The next digit of our result is 2. 
Result so far: 1135017.7692
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.

On to step 13:
13 goes into 40 3 times with a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 1135017.76923
Subtracting 39 from 40 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.

Moving on to step 14:
10 divided by 13 is 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 1135017.76923
Subtract 0 from 10 to 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.

Going ahead to step 15:
13 goes into 100 7 times with a remainder of 9.
The number 7 becomes the next digit in our result. 
Result so far: 1135017.7692307
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.

Going ahead to step 16:
The number 13 fits into 90 6 times, leaving a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 1135017.76923076
If we subtract 78 from 90, we 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.

The quotient of the division is 1135017.76923076, and the remainder is 1.2e-08.