We look at the division of 623163 by 13 
The aim is to understand the frequency of 13 in 623163.

Let's proceed to step 1:
When dividing 6 by 13, we get 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Fetch the next digit (2) from the dividend, attach it to 6 and continue: 62 / 13

Advancing to step 2:
When dividing 62 by 13, we get 4 with a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we take 52 away from 62, we end up with 10.
Bring next digit (3) of the dividend behind the 10 and repeat the process: 103 / 13

Let's proceed to step 3:
13 can be fit into 103 7 times, resulting in a remainder of 12.
The next digit of our result is 7. 
Result so far: 47.0
Deduct 91 from 103 and we're left with 12.
Take the next digit (1) from the dividend and append it to 12, then repeat: 121 / 13

Let's proceed to step 4:
13 goes into 121 9 times with a remainder of 4.
The number 9 becomes the next digit in our result. 
Result so far: 479.0
Subtract 117 from 121 to get 4.
Grab the next digit (6) from the dividend, add it to 4, then carry on: 46 / 13

Advancing to step 5:
46 divided by 13 is 3 with a remainder of 7.
The next digit of our result is 3. 
Result so far: 4793.0
Subtract 39 from 46 to get 7.
Append the next digit (3) from the dividend to 7 and continue with: 73 / 13

Moving on to step 6:
73 divided by 13 is 5 with a remainder of 8.
Write down 5 as next digit of the result. 
Result so far: 47935.0
Subtracting 65 from 73 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.

Step 7:
80 divided by 13 is 6 with a remainder of 2.
The next digit of our result is 6. 
Result so far: 47935.6
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 8:
The number 13 fits into 20 1 times, leaving a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 47935.61
If we take 13 away from 20, we end up 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.

Let's proceed to step 9:
13 can be fit into 70 5 times, resulting in a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 47935.615
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.

Let's proceed to step 10:
13 can be fit into 50 3 times, resulting in a remainder of 11.
The number 3 becomes the next digit in our result. 
Result so far: 47935.6153
If we take 39 away from 50, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 11:
13 goes into 110 8 times with a remainder of 6.
Put 8 as the next digit of the answer. 
Result so far: 47935.61538
The remainder is 6 after subtracting 104 from 110.
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 12:
If we divide 60 by 13, we get 4 and a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 47935.615384
If we take 52 away from 60, we end up 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.

Let's proceed to step 13:
When dividing 80 by 13, we get 6 with a remainder of 2.
The next digit of our result is 6. 
Result so far: 47935.6153846
The remainder is 2 after subtracting 78 from 80.
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 14:
20 divided by 13 is 1 with a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 47935.61538461
If we take 13 away from 20, we end up 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.

After the division, we end up with 47935.61538461 and a remainder of 7e-09.