803917 divided by 13 
The aim is to understand the frequency of 13 in 803917.

Step 1:
13 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Bring next digit (0) of the dividend behind the 8 and repeat the process: 80 / 13

Step 2:
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: 6.0
Deduct 78 from 80 and we're left with 2.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 13

Step 3:
When dividing 23 by 13, we get 1 with a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 61.0
The remainder is 10 after subtracting 13 from 23.
Fetch the next digit (9) from the dividend, attach it to 10 and continue: 109 / 13

Let's proceed to step 4:
When dividing 109 by 13, we get 8 with a remainder of 5.
Put 8 as the next digit of the answer. 
Result so far: 618.0
Deduct 104 from 109 and we're left with 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 13

Moving on to step 5:
If we divide 51 by 13, we get 3 and a remainder of 12.
Write down 3 as next digit of the result. 
Result so far: 6183.0
If we subtract 39 from 51, we get 12.
Fetch the next digit (7) from the dividend, attach it to 12 and continue: 127 / 13

Let's proceed to step 6:
13 goes into 127 9 times with a remainder of 10.
Record the quotient 9 as the next digit in the result. 
Result so far: 61839.0
The remainder is 10 after subtracting 117 from 127.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 7:
13 can be fit into 100 7 times, resulting in a remainder of 9.
The next digit of our result is 7. 
Result so far: 61839.7
If we take 91 away from 100, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 8:
When dividing 90 by 13, we get 6 with a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 61839.76
If we take 78 away from 90, we end up 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.

Moving on to step 9:
The number 13 fits into 120 9 times, leaving a remainder of 3.
Write down 9 as next digit of the result. 
Result so far: 61839.769
If we take 117 away from 120, we end up 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.

Moving on to step 10:
The number 13 fits into 30 2 times, leaving a remainder of 4.
The next digit of our result is 2. 
Result so far: 61839.7692
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.

Going ahead to step 11:
If we divide 40 by 13, we get 3 and a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 61839.76923
If we take 39 away from 40, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 12:
When dividing 10 by 13, we get 0 with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 61839.76923
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 13:
100 divided by 13 is 7 with a remainder of 9.
The next digit of our result is 7. 
Result so far: 61839.7692307
Subtracting 91 from 100 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 14:
If we divide 90 by 13, we get 6 and a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 61839.76923076
Subtract 78 from 90 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Our division results in 61839.76923076 with a remaining 1.2e-08.