We look at the division of 851535 by 84 
The aim is to understand the frequency of 84 in 851535.

On to step 1:
84 can be fit into 8 0 times, resulting in a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Take the next digit (5) from the dividend and append it to 8, then repeat: 85 / 84

Advancing to step 2:
84 goes into 85 1 times with a remainder of 1.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 84 from 85 and we're left with 1.
Include the next digit (1) from the dividend after 1, then repeat: 11 / 84

Step 3:
84 can be fit into 11 0 times, resulting in a remainder of 11.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Subtracting 0 from 11 leaves us with 11.
Fetch the next digit (5) from the dividend, attach it to 11 and continue: 115 / 84

Moving on to step 4:
84 goes into 115 1 times with a remainder of 31.
The next digit of our result is 1. 
Result so far: 101.0
Subtract 84 from 115 to get 31.
Bring next digit (3) of the dividend behind the 31 and repeat the process: 313 / 84

Advancing to step 5:
84 goes into 313 3 times with a remainder of 61.
The next digit of our result is 3. 
Result so far: 1013.0
If we subtract 252 from 313, we get 61.
Take the next digit (5) from the dividend and append it to 61, then repeat: 615 / 84

Step 6:
84 goes into 615 7 times with a remainder of 27.
Record the quotient 7 as the next digit in the result. 
Result so far: 10137.0
If we take 588 away from 615, we end up with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

On to step 7:
84 can be fit into 270 3 times, resulting in a remainder of 18.
Put 3 as the next digit of the answer. 
Result so far: 10137.3
The remainder is 18 after subtracting 252 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 8:
84 can be fit into 180 2 times, resulting in a remainder of 12.
The number 2 becomes the next digit in our result. 
Result so far: 10137.32
If we take 168 away from 180, 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.

Let's proceed to step 9:
When dividing 120 by 84, we get 1 with a remainder of 36.
Record the quotient 1 as the next digit in the result. 
Result so far: 10137.321
If we take 84 away from 120, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 10:
360 divided by 84 is 4 with a remainder of 24.
Use 4 as the next digit of our solution. 
Result so far: 10137.3214
If we take 336 away from 360, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 11:
240 divided by 84 is 2 with a remainder of 72.
The number 2 becomes the next digit in our result. 
Result so far: 10137.32142
Deduct 168 from 240 and we're left with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Moving on to step 12:
When dividing 720 by 84, we get 8 with a remainder of 48.
The next digit of our result is 8. 
Result so far: 10137.321428
Deduct 672 from 720 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 13:
84 goes into 480 5 times with a remainder of 60.
The next digit of our result is 5. 
Result so far: 10137.3214285
The remainder is 60 after subtracting 420 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 14:
84 goes into 600 7 times with a remainder of 12.
Record the quotient 7 as the next digit in the result. 
Result so far: 10137.32142857
Deduct 588 from 600 and we're left 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.

The final result is 10137.32142857 with a remainder of 1.2e-08.