We look at the division of 488505 by 13 
The aim is to understand the frequency of 13 in 488505.

Step 1:
When dividing 4 by 13, we get 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Include the next digit (8) from the dividend after 4, then repeat: 48 / 13

Moving on to step 2:
If we divide 48 by 13, we get 3 and a remainder of 9.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we subtract 39 from 48, we get 9.
Append the next digit (8) from the dividend to 9 and continue with: 98 / 13

Step 3:
13 can be fit into 98 7 times, resulting in a remainder of 7.
Record the quotient 7 as the next digit in the result. 
Result so far: 37.0
If we take 91 away from 98, we end up with 7.
Fetch the next digit (5) from the dividend, attach it to 7 and continue: 75 / 13

Let's proceed to step 4:
13 goes into 75 5 times with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 375.0
Subtract 65 from 75 to get 10.
Take the next digit (0) from the dividend and append it to 10, then repeat: 100 / 13

Going ahead to step 5:
The number 13 fits into 100 7 times, leaving a remainder of 9.
The number 7 becomes the next digit in our result. 
Result so far: 3757.0
Subtracting 91 from 100 leaves us with 9.
Fetch the next digit (5) from the dividend, attach it to 9 and continue: 95 / 13

Going ahead to step 6:
If we divide 95 by 13, we get 7 and a remainder of 4.
Use 7 as the next digit of our solution. 
Result so far: 37577.0
If we take 91 away from 95, 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.

Let's proceed to step 7:
13 goes into 40 3 times with a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 37577.3
Subtract 39 from 40 to 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.

Step 8:
The number 13 fits into 10 0 times, leaving a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 37577.3
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.

Advancing to step 9:
The number 13 fits into 100 7 times, leaving a remainder of 9.
The next digit of our result is 7. 
Result so far: 37577.307
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.

Step 10:
13 goes into 90 6 times with a remainder of 12.
The next digit of our result is 6. 
Result so far: 37577.3076
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.

Step 11:
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: 37577.30769
Subtracting 117 from 120 leaves us 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.

Moving on to step 12:
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: 37577.307692
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.

Moving on to step 13:
13 can be fit into 40 3 times, resulting in a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 37577.3076923
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.

Moving on to step 14:
13 goes into 10 0 times with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 37577.3076923
If we take 0 away from 10, 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.

After the division, we end up with 37577.3076923 and a remainder of 1e-08.