We look at the division of 787640 by 85 
The aim is to understand the frequency of 85 in 787640.

Advancing to step 1:
If we divide 7 by 85, we get 0 and a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 85

Advancing to step 2:
When dividing 78 by 85, we get 0 with a remainder of 78.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 78, we get 78.
Fetch the next digit (7) from the dividend, attach it to 78 and continue: 787 / 85

On to step 3:
85 can be fit into 787 9 times, resulting in a remainder of 22.
Use 9 as the next digit of our solution. 
Result so far: 9.0
The remainder is 22 after subtracting 765 from 787.
Include the next digit (6) from the dividend after 22, then repeat: 226 / 85

Step 4:
The number 85 fits into 226 2 times, leaving a remainder of 56.
Put 2 as the next digit of the answer. 
Result so far: 92.0
Deduct 170 from 226 and we're left with 56.
Take the next digit (4) from the dividend and append it to 56, then repeat: 564 / 85

Step 5:
85 goes into 564 6 times with a remainder of 54.
The next digit of our result is 6. 
Result so far: 926.0
The remainder is 54 after subtracting 510 from 564.
Take the next digit (0) from the dividend and append it to 54, then repeat: 540 / 85

Advancing to step 6:
540 divided by 85 is 6 with a remainder of 30.
Write down 6 as next digit of the result. 
Result so far: 9266.0
Subtract 510 from 540 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 7:
The number 85 fits into 300 3 times, leaving a remainder of 45.
The next digit of our result is 3. 
Result so far: 9266.3
Subtracting 255 from 300 leaves us with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Step 8:
When dividing 450 by 85, we get 5 with a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 9266.35
Subtracting 425 from 450 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 9:
The number 85 fits into 250 2 times, leaving a remainder of 80.
Write down 2 as next digit of the result. 
Result so far: 9266.352
The remainder is 80 after subtracting 170 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 10:
When dividing 800 by 85, we get 9 with a remainder of 35.
Use 9 as the next digit of our solution. 
Result so far: 9266.3529
Subtract 765 from 800 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Step 11:
If we divide 350 by 85, we get 4 and a remainder of 10.
Use 4 as the next digit of our solution. 
Result so far: 9266.35294
Deduct 340 from 350 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 12:
85 goes into 100 1 times with a remainder of 15.
Write down 1 as next digit of the result. 
Result so far: 9266.352941
Subtract 85 from 100 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 13:
The number 85 fits into 150 1 times, leaving a remainder of 65.
Record the quotient 1 as the next digit in the result. 
Result so far: 9266.3529411
If we subtract 85 from 150, we get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

The final result is 9266.3529411 with a remainder of 6.5e-07.