We're dividing 123155 by 13 
The aim is to understand the frequency of 13 in 123155.

Moving on to step 1:
When dividing 1 by 13, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 13

Let's proceed to step 2:
12 divided by 13 is 0 with a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Include the next digit (3) from the dividend after 12, then repeat: 123 / 13

Step 3:
13 can be fit into 123 9 times, resulting in a remainder of 6.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
If we take 117 away from 123, 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 4:
61 divided by 13 is 4 with a remainder of 9.
Put 4 as the next digit of the answer. 
Result so far: 94.0
Subtract 52 from 61 to get 9.
Append the next digit (5) from the dividend to 9 and continue with: 95 / 13

Advancing to step 5:
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: 947.0
If we take 91 away from 95, we end up with 4.
Include the next digit (5) from the dividend after 4, then repeat: 45 / 13

On to step 6:
When dividing 45 by 13, we get 3 with a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 9473.0
Subtracting 39 from 45 leaves us 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.

Step 7:
13 goes into 60 4 times with a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 9473.4
The remainder is 8 after subtracting 52 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 8:
When dividing 80 by 13, we get 6 with a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 9473.46
If we subtract 78 from 80, we 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 9:
When dividing 20 by 13, we get 1 with a remainder of 7.
The next digit of our result is 1. 
Result so far: 9473.461
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.

Moving on to step 10:
13 can be fit into 70 5 times, resulting in a remainder of 5.
The next digit of our result is 5. 
Result so far: 9473.4615
If we take 65 away from 70, we end up 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.

Advancing to step 11:
50 divided by 13 is 3 with a remainder of 11.
The next digit of our result is 3. 
Result so far: 9473.46153
Subtract 39 from 50 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 12:
110 divided by 13 is 8 with a remainder of 6.
Write down 8 as next digit of the result. 
Result so far: 9473.461538
Deduct 104 from 110 and we're left 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.

Going ahead to step 13:
13 can be fit into 60 4 times, resulting in a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 9473.4615384
Subtracting 52 from 60 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 14:
13 can be fit into 80 6 times, resulting in a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 9473.46153846
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.

The final outcome is 9473.46153846, with a leftover of 2e-09.