81837 divided by 85 
The aim is to understand the frequency of 85 in 81837.

Going ahead to step 1:
The number 85 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 85

Advancing to step 2:
The number 85 fits into 81 0 times, leaving a remainder of 81.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Bring next digit (8) of the dividend behind the 81 and repeat the process: 818 / 85

Going ahead to step 3:
The number 85 fits into 818 9 times, leaving a remainder of 53.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Subtracting 765 from 818 leaves us with 53.
Fetch the next digit (3) from the dividend, attach it to 53 and continue: 533 / 85

Advancing to step 4:
85 can be fit into 533 6 times, resulting in a remainder of 23.
Use 6 as the next digit of our solution. 
Result so far: 96.0
Subtract 510 from 533 to get 23.
Grab the next digit (7) from the dividend, add it to 23, then carry on: 237 / 85

Step 5:
237 divided by 85 is 2 with a remainder of 67.
The number 2 becomes the next digit in our result. 
Result so far: 962.0
Deduct 170 from 237 and we're left with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Step 6:
670 divided by 85 is 7 with a remainder of 75.
Put 7 as the next digit of the answer. 
Result so far: 962.7
Deduct 595 from 670 and we're left with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Moving on to step 7:
If we divide 750 by 85, we get 8 and a remainder of 70.
Write down 8 as next digit of the result. 
Result so far: 962.78
Subtracting 680 from 750 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 8:
85 can be fit into 700 8 times, resulting in a remainder of 20.
Record the quotient 8 as the next digit in the result. 
Result so far: 962.788
The remainder is 20 after subtracting 680 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Our division results in 962.788 with a remaining 0.002.