Let's divide 329571 by 13
The aim is to understand the frequency of 13 in 329571.

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
Subtracting 0 from 3 leaves us with 3.
Bring next digit (2) of the dividend behind the 3 and repeat the process: 32 / 13

Advancing to step 2:
If we divide 32 by 13, we get 2 and a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we subtract 26 from 32, we get 6.
Append the next digit (9) from the dividend to 6 and continue with: 69 / 13

Let's proceed to step 3:
The number 13 fits into 69 5 times, leaving a remainder of 4.
Put 5 as the next digit of the answer. 
Result so far: 25.0
Subtracting 65 from 69 leaves us with 4.
Take the next digit (5) from the dividend and append it to 4, then repeat: 45 / 13

Moving on to step 4:
13 can be fit into 45 3 times, resulting in a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 253.0
Subtracting 39 from 45 leaves us with 6.
Take the next digit (7) from the dividend and append it to 6, then repeat: 67 / 13

Going ahead to step 5:
13 can be fit into 67 5 times, resulting in a remainder of 2.
Put 5 as the next digit of the answer. 
Result so far: 2535.0
If we subtract 65 from 67, we get 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 13

Let's proceed to step 6:
The number 13 fits into 21 1 times, leaving a remainder of 8.
Put 1 as the next digit of the answer. 
Result so far: 25351.0
If we take 13 away from 21, 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.

Going ahead to step 7:
When dividing 80 by 13, we get 6 with a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 25351.6
The remainder is 2 after subtracting 78 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 8:
When dividing 20 by 13, we get 1 with a remainder of 7.
The next digit of our result is 1. 
Result so far: 25351.61
Subtracting 13 from 20 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 9:
If we divide 70 by 13, we get 5 and a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 25351.615
If we subtract 65 from 70, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 10:
13 can be fit into 50 3 times, resulting in a remainder of 11.
Put 3 as the next digit of the answer. 
Result so far: 25351.6153
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.

On to step 11:
110 divided by 13 is 8 with a remainder of 6.
The number 8 becomes the next digit in our result. 
Result so far: 25351.61538
Subtract 104 from 110 to 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.

On to step 12:
60 divided by 13 is 4 with a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 25351.615384
The remainder is 8 after subtracting 52 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 13:
13 goes into 80 6 times with a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 25351.6153846
The remainder is 2 after subtracting 78 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 14:
13 goes into 20 1 times with a remainder of 7.
The number 1 becomes the next digit in our result. 
Result so far: 25351.61538461
Subtracting 13 from 20 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

The final outcome is 25351.61538461, with a leftover of 7e-09.