We look at the division of 60243751 by 13 
The aim is to understand the frequency of 13 in 60243751.

Let's proceed to step 1:
6 divided by 13 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (0) from the dividend, add it to 6, then carry on: 60 / 13

Going ahead to step 2:
The number 13 fits into 60 4 times, leaving a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 8 after subtracting 52 from 60.
Grab the next digit (2) from the dividend, add it to 8, then carry on: 82 / 13

Let's proceed to step 3:
82 divided by 13 is 6 with a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 46.0
If we take 78 away from 82, we end up with 4.
Take the next digit (4) from the dividend and append it to 4, then repeat: 44 / 13

Let's proceed to step 4:
When dividing 44 by 13, we get 3 with a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 463.0
The remainder is 5 after subtracting 39 from 44.
Grab the next digit (3) from the dividend, add it to 5, then carry on: 53 / 13

On to step 5:
If we divide 53 by 13, we get 4 and a remainder of 1.
Put 4 as the next digit of the answer. 
Result so far: 4634.0
If we subtract 52 from 53, we get 1.
Grab the next digit (7) from the dividend, add it to 1, then carry on: 17 / 13

Step 6:
When dividing 17 by 13, we get 1 with a remainder of 4.
Write down 1 as next digit of the result. 
Result so far: 46341.0
Deduct 13 from 17 and we're left with 4.
Append the next digit (5) from the dividend to 4 and continue with: 45 / 13

On to step 7:
The number 13 fits into 45 3 times, leaving a remainder of 6.
The number 3 becomes the next digit in our result. 
Result so far: 463413.0
If we subtract 39 from 45, we get 6.
Take the next digit (1) from the dividend and append it to 6, then repeat: 61 / 13

Step 8:
When dividing 61 by 13, we get 4 with a remainder of 9.
Put 4 as the next digit of the answer. 
Result so far: 4634134.0
Deduct 52 from 61 and we're left 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 9:
The number 13 fits into 90 6 times, leaving a remainder of 12.
The next digit of our result is 6. 
Result so far: 4634134.6
If we take 78 away from 90, we end up 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.

Let's proceed to step 10:
When dividing 120 by 13, we get 9 with a remainder of 3.
The number 9 becomes the next digit in our result. 
Result so far: 4634134.69
If we take 117 away from 120, we end up with 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 11:
13 can be fit into 30 2 times, resulting in a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 4634134.692
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.

Step 12:
13 can be fit into 40 3 times, resulting in a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 4634134.6923
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.

Let's proceed to step 13:
13 goes into 10 0 times with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 4634134.6923
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.

Step 14:
If we divide 100 by 13, we get 7 and a remainder of 9.
The number 7 becomes the next digit in our result. 
Result so far: 4634134.692307
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 15:
If we divide 90 by 13, we get 6 and a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 4634134.6923076
Subtracting 78 from 90 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.

On to step 16:
If we divide 120 by 13, we get 9 and a remainder of 3.
The number 9 becomes the next digit in our result. 
Result so far: 4634134.69230769
If we take 117 away from 120, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

In conclusion, the division gives 4634134.69230769 with a balance of 3e-09.