618040 divided by 13 
The aim is to understand the frequency of 13 in 618040.

Advancing to step 1:
When dividing 6 by 13, we get 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (1) of the dividend behind the 6 and repeat the process: 61 / 13

Going ahead to step 2:
13 goes into 61 4 times with a remainder of 9.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Deduct 52 from 61 and we're left with 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 13

Moving on to step 3:
13 goes into 98 7 times with a remainder of 7.
Use 7 as the next digit of our solution. 
Result so far: 47.0
Deduct 91 from 98 and we're left with 7.
Take the next digit (0) from the dividend and append it to 7, then repeat: 70 / 13

Moving on to step 4:
13 goes into 70 5 times with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 475.0
Subtract 65 from 70 to get 5.
Include the next digit (4) from the dividend after 5, then repeat: 54 / 13

Going ahead to step 5:
The number 13 fits into 54 4 times, leaving a remainder of 2.
The next digit of our result is 4. 
Result so far: 4754.0
Deduct 52 from 54 and we're left with 2.
Bring next digit (0) of the dividend behind the 2 and repeat the process: 20 / 13

Moving on to step 6:
13 goes into 20 1 times with a remainder of 7.
The next digit of our result is 1. 
Result so far: 47541.0
Subtract 13 from 20 to get 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 7:
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: 47541.5
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 8:
13 can be fit into 50 3 times, resulting in a remainder of 11.
Put 3 as the next digit of the answer. 
Result so far: 47541.53
If we subtract 39 from 50, we 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.

On to step 9:
13 goes into 110 8 times with a remainder of 6.
Put 8 as the next digit of the answer. 
Result so far: 47541.538
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.

On to step 10:
When dividing 60 by 13, we get 4 with a remainder of 8.
Put 4 as the next digit of the answer. 
Result so far: 47541.5384
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.

Advancing to step 11:
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: 47541.53846
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 12:
When dividing 20 by 13, we get 1 with a remainder of 7.
The next digit of our result is 1. 
Result so far: 47541.538461
Subtract 13 from 20 to get 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 13:
If we divide 70 by 13, we get 5 and a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 47541.5384615
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 14:
The number 13 fits into 50 3 times, leaving a remainder of 11.
The number 3 becomes the next digit in our result. 
Result so far: 47541.53846153
Deduct 39 from 50 and we're left 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.

The quotient of the division is 47541.53846153, and the remainder is 1.1e-08.