Let's divide 723906 by 13
The aim is to understand the frequency of 13 in 723906.

Step 1:
If we divide 7 by 13, we get 0 and a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Bring next digit (2) of the dividend behind the 7 and repeat the process: 72 / 13

Moving on to step 2:
When dividing 72 by 13, we get 5 with a remainder of 7.
The next digit of our result is 5. 
Result so far: 5.0
Subtracting 65 from 72 leaves us with 7.
Take the next digit (3) from the dividend and append it to 7, then repeat: 73 / 13

Advancing to step 3:
73 divided by 13 is 5 with a remainder of 8.
Use 5 as the next digit of our solution. 
Result so far: 55.0
If we subtract 65 from 73, we get 8.
Include the next digit (9) from the dividend after 8, then repeat: 89 / 13

Moving on to step 4:
The number 13 fits into 89 6 times, leaving a remainder of 11.
The next digit of our result is 6. 
Result so far: 556.0
Subtracting 78 from 89 leaves us with 11.
Take the next digit (0) from the dividend and append it to 11, then repeat: 110 / 13

Going ahead to step 5:
13 goes into 110 8 times with a remainder of 6.
Put 8 as the next digit of the answer. 
Result so far: 5568.0
The remainder is 6 after subtracting 104 from 110.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 13

On to step 6:
13 can be fit into 66 5 times, resulting in a remainder of 1.
The next digit of our result is 5. 
Result so far: 55685.0
The remainder is 1 after subtracting 65 from 66.
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 7:
13 goes into 10 0 times with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 55685.0
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.

Moving on to step 8:
13 goes into 100 7 times with a remainder of 9.
Record the quotient 7 as the next digit in the result. 
Result so far: 55685.07
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 9:
When dividing 90 by 13, we get 6 with a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 55685.076
The remainder is 12 after subtracting 78 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 10:
120 divided by 13 is 9 with a remainder of 3.
The next digit of our result is 9. 
Result so far: 55685.0769
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.

Moving on to step 11:
13 goes into 30 2 times with a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 55685.07692
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.

Going ahead to step 12:
When dividing 40 by 13, we get 3 with a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 55685.076923
The remainder is 1 after subtracting 39 from 40.
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 13:
If we divide 10 by 13, we get 0 and a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 55685.076923
Subtracting 0 from 10 leaves us with 10.
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 14:
13 goes into 100 7 times with a remainder of 9.
The number 7 becomes the next digit in our result. 
Result so far: 55685.07692307
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.

The final result is 55685.07692307 with a remainder of 9e-09.