We look at the division of 765871 by 85 
The aim is to understand the frequency of 85 in 765871.

Going ahead to step 1:
When dividing 7 by 85, we get 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Include the next digit (6) from the dividend after 7, then repeat: 76 / 85

Let's proceed to step 2:
The number 85 fits into 76 0 times, leaving a remainder of 76.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 76 after subtracting 0 from 76.
Fetch the next digit (5) from the dividend, attach it to 76 and continue: 765 / 85

On to step 3:
85 goes into 765 9 times with a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
If we subtract 765 from 765, we get 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 85

Advancing to step 4:
85 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 90.0
If we take 0 away from 8, we end up with 8.
Bring next digit (7) of the dividend behind the 8 and repeat the process: 87 / 85

Moving on to step 5:
85 can be fit into 87 1 times, resulting in a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 901.0
Deduct 85 from 87 and we're left with 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 85

On to step 6:
85 can be fit into 21 0 times, resulting in a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 9010.0
Subtract 0 from 21 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 7:
When dividing 210 by 85, we get 2 with a remainder of 40.
The next digit of our result is 2. 
Result so far: 9010.2
If we take 170 away from 210, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 8:
400 divided by 85 is 4 with a remainder of 60.
The number 4 becomes the next digit in our result. 
Result so far: 9010.24
The remainder is 60 after subtracting 340 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 9:
85 can be fit into 600 7 times, resulting in a remainder of 5.
Record the quotient 7 as the next digit in the result. 
Result so far: 9010.247
Subtract 595 from 600 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 10:
When dividing 50 by 85, we get 0 with a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 9010.247
If we subtract 0 from 50, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 11:
85 can be fit into 500 5 times, resulting in a remainder of 75.
Write down 5 as next digit of the result. 
Result so far: 9010.24705
Subtracting 425 from 500 leaves us 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.

Step 12:
750 divided by 85 is 8 with a remainder of 70.
Write down 8 as next digit of the result. 
Result so far: 9010.247058
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.

Going ahead to step 13:
700 divided by 85 is 8 with a remainder of 20.
Use 8 as the next digit of our solution. 
Result so far: 9010.2470588
Deduct 680 from 700 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

After the division, we end up with 9010.2470588 and a remainder of 2e-07.