616784 ÷ 13 
The aim is to understand the frequency of 13 in 616784.

On to step 1:
6 divided by 13 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (1) from the dividend, add it to 6, then carry on: 61 / 13

Let's proceed to step 2:
If we divide 61 by 13, we get 4 and a remainder of 9.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtract 52 from 61 to get 9.
Bring next digit (6) of the dividend behind the 9 and repeat the process: 96 / 13

On to step 3:
13 goes into 96 7 times with a remainder of 5.
Put 7 as the next digit of the answer. 
Result so far: 47.0
If we take 91 away from 96, we end up with 5.
Append the next digit (7) from the dividend to 5 and continue with: 57 / 13

Step 4:
13 can be fit into 57 4 times, resulting in a remainder of 5.
Use 4 as the next digit of our solution. 
Result so far: 474.0
The remainder is 5 after subtracting 52 from 57.
Take the next digit (8) from the dividend and append it to 5, then repeat: 58 / 13

Moving on to step 5:
13 goes into 58 4 times with a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 4744.0
Deduct 52 from 58 and we're left with 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 13

Going ahead to step 6:
13 can be fit into 64 4 times, resulting in a remainder of 12.
The next digit of our result is 4. 
Result so far: 47444.0
The remainder is 12 after subtracting 52 from 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 7:
13 goes into 120 9 times with a remainder of 3.
Write down 9 as next digit of the result. 
Result so far: 47444.9
Deduct 117 from 120 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 8:
When dividing 30 by 13, we get 2 with a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 47444.92
Subtracting 26 from 30 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 9:
40 divided by 13 is 3 with a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 47444.923
Subtract 39 from 40 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 10:
13 can be fit into 10 0 times, resulting in a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 47444.923
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 11:
13 can be fit into 100 7 times, resulting in a remainder of 9.
Use 7 as the next digit of our solution. 
Result so far: 47444.92307
If we subtract 91 from 100, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 12:
13 can be fit into 90 6 times, resulting in a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 47444.923076
Subtracting 78 from 90 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 13:
13 can be fit into 120 9 times, resulting in a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 47444.9230769
If we subtract 117 from 120, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 14:
The number 13 fits into 30 2 times, leaving a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 47444.92307692
If we take 26 away from 30, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

After the division, we end up with 47444.92307692 and a remainder of 4e-09.