236889 ÷ 13 
The aim is to understand the frequency of 13 in 236889.

Moving on to step 1:
The number 13 fits into 2 0 times, leaving a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Grab the next digit (3) from the dividend, add it to 2, then carry on: 23 / 13

Going ahead to step 2:
If we divide 23 by 13, we get 1 and a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 13 from 23 leaves us with 10.
Grab the next digit (6) from the dividend, add it to 10, then carry on: 106 / 13

Moving on to step 3:
106 divided by 13 is 8 with a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 18.0
If we subtract 104 from 106, we get 2.
Bring next digit (8) of the dividend behind the 2 and repeat the process: 28 / 13

Moving on to step 4:
13 can be fit into 28 2 times, resulting in a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 182.0
If we subtract 26 from 28, we get 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 13

On to step 5:
If we divide 28 by 13, we get 2 and a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 1822.0
If we take 26 away from 28, we end up with 2.
Append the next digit (9) from the dividend to 2 and continue with: 29 / 13

Step 6:
If we divide 29 by 13, we get 2 and a remainder of 3.
The number 2 becomes the next digit in our result. 
Result so far: 18222.0
Subtract 26 from 29 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.

Moving on to step 7:
The number 13 fits into 30 2 times, leaving a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 18222.2
Deduct 26 from 30 and we're left 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.

Advancing to step 8:
13 goes into 40 3 times with a remainder of 1.
The next digit of our result is 3. 
Result so far: 18222.23
Deduct 39 from 40 and we're left 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.

Let's proceed to step 9:
The number 13 fits into 10 0 times, leaving a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 18222.23
The remainder is 10 after subtracting 0 from 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 10:
13 can be fit into 100 7 times, resulting in a remainder of 9.
The number 7 becomes the next digit in our result. 
Result so far: 18222.2307
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.

Advancing to step 11:
13 can be fit into 90 6 times, resulting in a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 18222.23076
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.

Going ahead to step 12:
When dividing 120 by 13, we get 9 with a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 18222.230769
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 13:
The number 13 fits into 30 2 times, leaving a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 18222.2307692
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.

Advancing to step 14:
40 divided by 13 is 3 with a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 18222.23076923
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.

In conclusion, the division gives 18222.23076923 with a balance of 1e-09.