647043 divided by 13 
The aim is to understand the frequency of 13 in 647043.

Going ahead to step 1:
When dividing 6 by 13, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 13

Going ahead to step 2:
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: 4.0
If we subtract 52 from 64, we get 12.
Include the next digit (7) from the dividend after 12, then repeat: 127 / 13

On to step 3:
13 can be fit into 127 9 times, resulting in a remainder of 10.
Record the quotient 9 as the next digit in the result. 
Result so far: 49.0
If we subtract 117 from 127, we get 10.
Include the next digit (0) from the dividend after 10, then repeat: 100 / 13

Advancing to step 4:
100 divided by 13 is 7 with a remainder of 9.
The next digit of our result is 7. 
Result so far: 497.0
The remainder is 9 after subtracting 91 from 100.
Fetch the next digit (4) from the dividend, attach it to 9 and continue: 94 / 13

Step 5:
If we divide 94 by 13, we get 7 and a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 4977.0
If we subtract 91 from 94, we get 3.
Include the next digit (3) from the dividend after 3, then repeat: 33 / 13

Advancing to step 6:
13 can be fit into 33 2 times, resulting in a remainder of 7.
The next digit of our result is 2. 
Result so far: 49772.0
The remainder is 7 after subtracting 26 from 33.
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:
70 divided by 13 is 5 with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 49772.5
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.

Step 8:
When dividing 50 by 13, we get 3 with a remainder of 11.
Write down 3 as next digit of the result. 
Result so far: 49772.53
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.

Step 9:
If we divide 110 by 13, we get 8 and a remainder of 6.
Use 8 as the next digit of our solution. 
Result so far: 49772.538
If we subtract 104 from 110, we get 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 10:
The number 13 fits into 60 4 times, leaving a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 49772.5384
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.

Step 11:
If we divide 80 by 13, we get 6 and a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 49772.53846
If we take 78 away from 80, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 12:
20 divided by 13 is 1 with a remainder of 7.
The number 1 becomes the next digit in our result. 
Result so far: 49772.538461
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.

Advancing to step 13:
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: 49772.5384615
Deduct 65 from 70 and we're left 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.

Moving on to step 14:
13 can be fit into 50 3 times, resulting in a remainder of 11.
Record the quotient 3 as the next digit in the result. 
Result so far: 49772.53846153
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.

Our division results in 49772.53846153 with a remaining 1.1e-08.