We look at the division of 334674 by 13 
The aim is to understand the frequency of 13 in 334674.

Let's proceed to step 1:
When dividing 3 by 13, we get 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Bring next digit (3) of the dividend behind the 3 and repeat the process: 33 / 13

On to step 2:
The number 13 fits into 33 2 times, leaving a remainder of 7.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 26 from 33 leaves us with 7.
Append the next digit (4) from the dividend to 7 and continue with: 74 / 13

Step 3:
13 can be fit into 74 5 times, resulting in a remainder of 9.
Use 5 as the next digit of our solution. 
Result so far: 25.0
The remainder is 9 after subtracting 65 from 74.
Fetch the next digit (6) from the dividend, attach it to 9 and continue: 96 / 13

Advancing to step 4:
The number 13 fits into 96 7 times, leaving a remainder of 5.
Use 7 as the next digit of our solution. 
Result so far: 257.0
The remainder is 5 after subtracting 91 from 96.
Fetch the next digit (7) from the dividend, attach it to 5 and continue: 57 / 13

On to step 5:
The number 13 fits into 57 4 times, leaving a remainder of 5.
Put 4 as the next digit of the answer. 
Result so far: 2574.0
Subtracting 52 from 57 leaves us with 5.
Bring next digit (4) of the dividend behind the 5 and repeat the process: 54 / 13

Let's proceed to step 6:
13 goes into 54 4 times with a remainder of 2.
Put 4 as the next digit of the answer. 
Result so far: 25744.0
If we subtract 52 from 54, we get 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 7:
13 can be fit into 20 1 times, resulting in a remainder of 7.
Record the quotient 1 as the next digit in the result. 
Result so far: 25744.1
The remainder is 7 after subtracting 13 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 8:
When dividing 70 by 13, we get 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 25744.15
If we take 65 away from 70, we end up 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 9:
50 divided by 13 is 3 with a remainder of 11.
Write down 3 as next digit of the result. 
Result so far: 25744.153
Subtract 39 from 50 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 10:
13 goes into 110 8 times with a remainder of 6.
Record the quotient 8 as the next digit in the result. 
Result so far: 25744.1538
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 11:
60 divided by 13 is 4 with a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 25744.15384
Deduct 52 from 60 and we're left 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 12:
80 divided by 13 is 6 with a remainder of 2.
The next digit of our result is 6. 
Result so far: 25744.153846
Subtracting 78 from 80 leaves us 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.

Step 13:
20 divided by 13 is 1 with a remainder of 7.
Write down 1 as next digit of the result. 
Result so far: 25744.1538461
If we take 13 away from 20, we end up 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.

Advancing to step 14:
13 can be fit into 70 5 times, resulting in a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 25744.15384615
If we take 65 away from 70, we end up 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.

Our division results in 25744.15384615 with a remaining 5e-09.