385823 ÷ 13 
The aim is to understand the frequency of 13 in 385823.

Step 1:
3 divided by 13 is 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Grab the next digit (8) from the dividend, add it to 3, then carry on: 38 / 13

Moving on to step 2:
If we divide 38 by 13, we get 2 and a remainder of 12.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 26 away from 38, we end up with 12.
Bring next digit (5) of the dividend behind the 12 and repeat the process: 125 / 13

Advancing to step 3:
If we divide 125 by 13, we get 9 and a remainder of 8.
Put 9 as the next digit of the answer. 
Result so far: 29.0
Subtracting 117 from 125 leaves us with 8.
Take the next digit (8) from the dividend and append it to 8, then repeat: 88 / 13

Step 4:
13 goes into 88 6 times with a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 296.0
If we take 78 away from 88, we end up with 10.
Fetch the next digit (2) from the dividend, attach it to 10 and continue: 102 / 13

Going ahead to step 5:
If we divide 102 by 13, we get 7 and a remainder of 11.
The number 7 becomes the next digit in our result. 
Result so far: 2967.0
If we take 91 away from 102, we end up with 11.
Bring next digit (3) of the dividend behind the 11 and repeat the process: 113 / 13

Moving on to step 6:
If we divide 113 by 13, we get 8 and a remainder of 9.
Put 8 as the next digit of the answer. 
Result so far: 29678.0
The remainder is 9 after subtracting 104 from 113.
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 7:
13 goes into 90 6 times with a remainder of 12.
The next digit of our result is 6. 
Result so far: 29678.6
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.

Advancing to step 8:
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: 29678.69
Subtract 117 from 120 to 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 9:
13 goes into 30 2 times with a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 29678.692
Subtract 26 from 30 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 10:
13 can be fit into 40 3 times, resulting in a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 29678.6923
Subtracting 39 from 40 leaves us 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 11:
The number 13 fits into 10 0 times, leaving a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 29678.6923
Deduct 0 from 10 and we're left 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.

Going ahead to step 12:
100 divided by 13 is 7 with a remainder of 9.
Put 7 as the next digit of the answer. 
Result so far: 29678.692307
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 13:
If we divide 90 by 13, we get 6 and a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 29678.6923076
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.

Going ahead to step 14:
13 goes into 120 9 times with a remainder of 3.
Write down 9 as next digit of the result. 
Result so far: 29678.69230769
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.

The final outcome is 29678.69230769, with a leftover of 3e-09.