We're dividing 15080613 by 13 
The aim is to understand the frequency of 13 in 15080613.

On to step 1:
13 can be fit into 1 0 times, resulting in a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 13

Step 2:
When dividing 15 by 13, we get 1 with a remainder of 2.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 13 from 15, we get 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 13

On to step 3:
20 divided by 13 is 1 with a remainder of 7.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
If we subtract 13 from 20, we get 7.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 13

On to step 4:
The number 13 fits into 78 6 times, leaving a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 116.0
Subtracting 78 from 78 leaves us with 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 13

Step 5:
13 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 1160.0
If we take 0 away from 0, we end up with 0.
Take the next digit (6) from the dividend and append it to 0, then repeat: 6 / 13

Moving on to step 6:
6 divided by 13 is 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 11600.0
If we take 0 away from 6, we end up with 6.
Bring next digit (1) of the dividend behind the 6 and repeat the process: 61 / 13

Moving on to step 7:
The number 13 fits into 61 4 times, leaving a remainder of 9.
The next digit of our result is 4. 
Result so far: 116004.0
Subtract 52 from 61 to get 9.
Grab the next digit (3) from the dividend, add it to 9, then carry on: 93 / 13

Step 8:
13 goes into 93 7 times with a remainder of 2.
Put 7 as the next digit of the answer. 
Result so far: 1160047.0
The remainder is 2 after subtracting 91 from 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 9:
The number 13 fits into 20 1 times, leaving a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 1160047.1
Deduct 13 from 20 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 10:
When dividing 70 by 13, we get 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 1160047.15
The remainder is 5 after subtracting 65 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 11:
13 goes into 50 3 times with a remainder of 11.
Use 3 as the next digit of our solution. 
Result so far: 1160047.153
The remainder is 11 after subtracting 39 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 12:
13 can be fit into 110 8 times, resulting in a remainder of 6.
Use 8 as the next digit of our solution. 
Result so far: 1160047.1538
If we take 104 away from 110, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 13:
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: 1160047.15384
Subtract 52 from 60 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 14:
When dividing 80 by 13, we get 6 with a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 1160047.153846
Subtract 78 from 80 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 15:
The number 13 fits into 20 1 times, leaving a remainder of 7.
Write down 1 as next digit of the result. 
Result so far: 1160047.1538461
Subtracting 13 from 20 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 16:
If we divide 70 by 13, we get 5 and a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 1160047.15384615
Subtracting 65 from 70 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The final outcome is 1160047.15384615, with a leftover of 5e-09.