We look at the division of 313570 by 85 
The aim is to understand the frequency of 85 in 313570.

Going ahead to step 1:
When dividing 3 by 85, we get 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 85

Moving on to step 2:
31 divided by 85 is 0 with a remainder of 31.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 31, we end up with 31.
Append the next digit (3) from the dividend to 31 and continue with: 313 / 85

Going ahead to step 3:
85 goes into 313 3 times with a remainder of 58.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtract 255 from 313 to get 58.
Take the next digit (5) from the dividend and append it to 58, then repeat: 585 / 85

Advancing to step 4:
85 can be fit into 585 6 times, resulting in a remainder of 75.
Record the quotient 6 as the next digit in the result. 
Result so far: 36.0
Subtracting 510 from 585 leaves us with 75.
Include the next digit (7) from the dividend after 75, then repeat: 757 / 85

Step 5:
The number 85 fits into 757 8 times, leaving a remainder of 77.
The next digit of our result is 8. 
Result so far: 368.0
If we subtract 680 from 757, we get 77.
Fetch the next digit (0) from the dividend, attach it to 77 and continue: 770 / 85

Moving on to step 6:
85 can be fit into 770 9 times, resulting in a remainder of 5.
The next digit of our result is 9. 
Result so far: 3689.0
Deduct 765 from 770 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 7:
If we divide 50 by 85, we get 0 and a remainder of 50.
Use 0 as the next digit of our solution. 
Result so far: 3689.0
Deduct 0 from 50 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 8:
85 goes into 500 5 times with a remainder of 75.
Record the quotient 5 as the next digit in the result. 
Result so far: 3689.05
Subtract 425 from 500 to get 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 9:
85 goes into 750 8 times with a remainder of 70.
Use 8 as the next digit of our solution. 
Result so far: 3689.058
Subtract 680 from 750 to get 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 10:
85 goes into 700 8 times with a remainder of 20.
Use 8 as the next digit of our solution. 
Result so far: 3689.0588
Subtract 680 from 700 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final outcome is 3689.0588, with a leftover of 0.0002.