Let's divide 236839 by 13
The aim is to understand the frequency of 13 in 236839.

Advancing to step 1:
When dividing 2 by 13, we get 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Take the next digit (3) from the dividend and append it to 2, then repeat: 23 / 13

Moving on to step 2:
13 goes into 23 1 times with a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 13 away from 23, we end up with 10.
Take the next digit (6) from the dividend and append it to 10, then repeat: 106 / 13

Step 3:
106 divided by 13 is 8 with a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 18.0
Deduct 104 from 106 and we're left with 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 13

Step 4:
13 can be fit into 28 2 times, resulting in a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 182.0
Subtracting 26 from 28 leaves us with 2.
Bring next digit (3) of the dividend behind the 2 and repeat the process: 23 / 13

On to step 5:
If we divide 23 by 13, we get 1 and a remainder of 10.
The next digit of our result is 1. 
Result so far: 1821.0
If we take 13 away from 23, we end up with 10.
Fetch the next digit (9) from the dividend, attach it to 10 and continue: 109 / 13

Advancing to step 6:
13 can be fit into 109 8 times, resulting in a remainder of 5.
Use 8 as the next digit of our solution. 
Result so far: 18218.0
Subtract 104 from 109 to 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 7:
13 goes into 50 3 times with a remainder of 11.
Use 3 as the next digit of our solution. 
Result so far: 18218.3
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.

Step 8:
13 can be fit into 110 8 times, resulting in a remainder of 6.
Use 8 as the next digit of our solution. 
Result so far: 18218.38
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.

Advancing to step 9:
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: 18218.384
Subtracting 52 from 60 leaves us 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 10:
13 can be fit into 80 6 times, resulting in a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 18218.3846
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 11:
The number 13 fits into 20 1 times, leaving a remainder of 7.
Write down 1 as next digit of the result. 
Result so far: 18218.38461
Deduct 13 from 20 and we're left 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 12:
When dividing 70 by 13, we get 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 18218.384615
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 13:
The number 13 fits into 50 3 times, leaving a remainder of 11.
Use 3 as the next digit of our solution. 
Result so far: 18218.3846153
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.

Advancing to step 14:
When dividing 110 by 13, we get 8 with a remainder of 6.
Put 8 as the next digit of the answer. 
Result so far: 18218.38461538
Subtracting 104 from 110 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The quotient of the division is 18218.38461538, and the remainder is 6e-09.