91713499 ÷ 85 
The aim is to understand the frequency of 85 in 91713499.

Advancing to step 1:
85 goes into 9 0 times with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 85

Let's proceed to step 2:
When dividing 91 by 85, we get 1 with a remainder of 6.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 6 after subtracting 85 from 91.
Take the next digit (7) from the dividend and append it to 6, then repeat: 67 / 85

Moving on to step 3:
The number 85 fits into 67 0 times, leaving a remainder of 67.
Write down 0 as next digit of the result. 
Result so far: 10.0
The remainder is 67 after subtracting 0 from 67.
Grab the next digit (1) from the dividend, add it to 67, then carry on: 671 / 85

Going ahead to step 4:
85 can be fit into 671 7 times, resulting in a remainder of 76.
Write down 7 as next digit of the result. 
Result so far: 107.0
Subtracting 595 from 671 leaves us with 76.
Append the next digit (3) from the dividend to 76 and continue with: 763 / 85

Let's proceed to step 5:
The number 85 fits into 763 8 times, leaving a remainder of 83.
Record the quotient 8 as the next digit in the result. 
Result so far: 1078.0
If we take 680 away from 763, we end up with 83.
Bring next digit (4) of the dividend behind the 83 and repeat the process: 834 / 85

Let's proceed to step 6:
If we divide 834 by 85, we get 9 and a remainder of 69.
Put 9 as the next digit of the answer. 
Result so far: 10789.0
If we take 765 away from 834, we end up with 69.
Fetch the next digit (9) from the dividend, attach it to 69 and continue: 699 / 85

Moving on to step 7:
The number 85 fits into 699 8 times, leaving a remainder of 19.
The next digit of our result is 8. 
Result so far: 107898.0
If we subtract 680 from 699, we get 19.
Bring next digit (9) of the dividend behind the 19 and repeat the process: 199 / 85

Step 8:
85 can be fit into 199 2 times, resulting in a remainder of 29.
Put 2 as the next digit of the answer. 
Result so far: 1078982.0
Deduct 170 from 199 and we're left with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Advancing to step 9:
85 can be fit into 290 3 times, resulting in a remainder of 35.
Use 3 as the next digit of our solution. 
Result so far: 1078982.3
If we subtract 255 from 290, we 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.

Going ahead to step 10:
85 can be fit into 350 4 times, resulting in a remainder of 10.
The number 4 becomes the next digit in our result. 
Result so far: 1078982.34
If we subtract 340 from 350, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 11:
If we divide 100 by 85, we get 1 and a remainder of 15.
Use 1 as the next digit of our solution. 
Result so far: 1078982.341
Deduct 85 from 100 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 12:
85 goes into 150 1 times with a remainder of 65.
Put 1 as the next digit of the answer. 
Result so far: 1078982.3411
If we take 85 away from 150, we end up with 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 1078982.3411 with a remainder of 0.00065.