We look at the division of 28028559 by 13 
The aim is to understand the frequency of 13 in 28028559.

Moving on to step 1:
When dividing 2 by 13, we get 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Bring next digit (8) of the dividend behind the 2 and repeat the process: 28 / 13

On to step 2:
When dividing 28 by 13, we get 2 with a remainder of 2.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 26 from 28, we get 2.
Take the next digit (0) from the dividend and append it to 2, then repeat: 20 / 13

Let's proceed to step 3:
20 divided by 13 is 1 with a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 21.0
Subtract 13 from 20 to get 7.
Grab the next digit (2) from the dividend, add it to 7, then carry on: 72 / 13

On to step 4:
13 can be fit into 72 5 times, resulting in a remainder of 7.
Write down 5 as next digit of the result. 
Result so far: 215.0
Subtracting 65 from 72 leaves us with 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 13

Step 5:
If we divide 78 by 13, we get 6 and a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 2156.0
The remainder is 0 after subtracting 78 from 78.
Bring next digit (5) of the dividend behind the 0 and repeat the process: 5 / 13

Let's proceed to step 6:
If we divide 5 by 13, we get 0 and a remainder of 5.
The next digit of our result is 0. 
Result so far: 21560.0
Subtracting 0 from 5 leaves us with 5.
Take the next digit (5) from the dividend and append it to 5, then repeat: 55 / 13

Advancing to step 7:
The number 13 fits into 55 4 times, leaving a remainder of 3.
Use 4 as the next digit of our solution. 
Result so far: 215604.0
The remainder is 3 after subtracting 52 from 55.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 13

Step 8:
If we divide 39 by 13, we get 3 and a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 2156043.0
Subtracting 39 from 39 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
13 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 2156043.0
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 10:
13 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 2156043.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 2156043.0, with a leftover of 0.0.