236923 divided by 86 
The aim is to understand the frequency of 86 in 236923.

On to step 1:
When dividing 2 by 86, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Fetch the next digit (3) from the dividend, attach it to 2 and continue: 23 / 86

Going ahead to step 2:
86 goes into 23 0 times with a remainder of 23.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 23, we get 23.
Include the next digit (6) from the dividend after 23, then repeat: 236 / 86

On to step 3:
236 divided by 86 is 2 with a remainder of 64.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 172 from 236 and we're left with 64.
Grab the next digit (9) from the dividend, add it to 64, then carry on: 649 / 86

Moving on to step 4:
649 divided by 86 is 7 with a remainder of 47.
Write down 7 as next digit of the result. 
Result so far: 27.0
If we subtract 602 from 649, we get 47.
Include the next digit (2) from the dividend after 47, then repeat: 472 / 86

Moving on to step 5:
When dividing 472 by 86, we get 5 with a remainder of 42.
Write down 5 as next digit of the result. 
Result so far: 275.0
If we subtract 430 from 472, we get 42.
Take the next digit (3) from the dividend and append it to 42, then repeat: 423 / 86

Advancing to step 6:
The number 86 fits into 423 4 times, leaving a remainder of 79.
The number 4 becomes the next digit in our result. 
Result so far: 2754.0
Deduct 344 from 423 and we're left with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

On to step 7:
If we divide 790 by 86, we get 9 and a remainder of 16.
Put 9 as the next digit of the answer. 
Result so far: 2754.9
If we take 774 away from 790, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 8:
When dividing 160 by 86, we get 1 with a remainder of 74.
Put 1 as the next digit of the answer. 
Result so far: 2754.91
Subtracting 86 from 160 leaves us with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Advancing to step 9:
When dividing 740 by 86, we get 8 with a remainder of 52.
Write down 8 as next digit of the result. 
Result so far: 2754.918
If we take 688 away from 740, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

On to step 10:
The number 86 fits into 520 6 times, leaving a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 2754.9186
If we subtract 516 from 520, we 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.

Going ahead to step 11:
The number 86 fits into 40 0 times, leaving a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 2754.9186
The remainder is 40 after subtracting 0 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 12:
86 can be fit into 400 4 times, resulting in a remainder of 56.
The number 4 becomes the next digit in our result. 
Result so far: 2754.918604
The remainder is 56 after subtracting 344 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Going ahead to step 13:
86 can be fit into 560 6 times, resulting in a remainder of 44.
The next digit of our result is 6. 
Result so far: 2754.9186046
The remainder is 44 after subtracting 516 from 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Let's proceed to step 14:
The number 86 fits into 440 5 times, leaving a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 2754.91860465
Subtract 430 from 440 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 2754.91860465 with a remainder of 1e-08.