We're dividing 210844 by 86 
The aim is to understand the frequency of 86 in 210844.

Let's proceed to step 1:
86 goes into 2 0 times with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 86

Going ahead to step 2:
If we divide 21 by 86, we get 0 and a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Take the next digit (0) from the dividend and append it to 21, then repeat: 210 / 86

Let's proceed to step 3:
If we divide 210 by 86, we get 2 and a remainder of 38.
The next digit of our result is 2. 
Result so far: 2.0
Subtracting 172 from 210 leaves us with 38.
Include the next digit (8) from the dividend after 38, then repeat: 388 / 86

Advancing to step 4:
86 can be fit into 388 4 times, resulting in a remainder of 44.
Record the quotient 4 as the next digit in the result. 
Result so far: 24.0
Subtract 344 from 388 to get 44.
Bring next digit (4) of the dividend behind the 44 and repeat the process: 444 / 86

On to step 5:
444 divided by 86 is 5 with a remainder of 14.
Record the quotient 5 as the next digit in the result. 
Result so far: 245.0
Subtracting 430 from 444 leaves us with 14.
Grab the next digit (4) from the dividend, add it to 14, then carry on: 144 / 86

Step 6:
The number 86 fits into 144 1 times, leaving a remainder of 58.
Write down 1 as next digit of the result. 
Result so far: 2451.0
If we subtract 86 from 144, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 7:
86 goes into 580 6 times with a remainder of 64.
The number 6 becomes the next digit in our result. 
Result so far: 2451.6
If we take 516 away from 580, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Step 8:
When dividing 640 by 86, we get 7 with a remainder of 38.
Write down 7 as next digit of the result. 
Result so far: 2451.67
Deduct 602 from 640 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 9:
86 goes into 380 4 times with a remainder of 36.
The next digit of our result is 4. 
Result so far: 2451.674
The remainder is 36 after subtracting 344 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 10:
If we divide 360 by 86, we get 4 and a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 2451.6744
Deduct 344 from 360 and we're left 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.

The final result is 2451.6744 with a remainder of 0.00016.