We look at the division of 864501 by 85 
The aim is to understand the frequency of 85 in 864501.

Going ahead to step 1:
8 divided by 85 is 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 85

Going ahead to step 2:
When dividing 86 by 85, we get 1 with a remainder of 1.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 85 from 86 to get 1.
Append the next digit (4) from the dividend to 1 and continue with: 14 / 85

Going ahead to step 3:
The number 85 fits into 14 0 times, leaving a remainder of 14.
The next digit of our result is 0. 
Result so far: 10.0
Subtracting 0 from 14 leaves us with 14.
Bring next digit (5) of the dividend behind the 14 and repeat the process: 145 / 85

On to step 4:
85 goes into 145 1 times with a remainder of 60.
The number 1 becomes the next digit in our result. 
Result so far: 101.0
If we take 85 away from 145, we end up with 60.
Include the next digit (0) from the dividend after 60, then repeat: 600 / 85

Step 5:
600 divided by 85 is 7 with a remainder of 5.
Write down 7 as next digit of the result. 
Result so far: 1017.0
Subtract 595 from 600 to get 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 85

Let's proceed to step 6:
The number 85 fits into 51 0 times, leaving a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 10170.0
Deduct 0 from 51 and we're left with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Step 7:
When dividing 510 by 85, we get 6 with a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 10170.6
Deduct 510 from 510 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
85 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 10170.6
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 9:
The number 85 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 10170.6
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 10170.6 with a remainder of 0.0.