We divide 9791 by 86
The aim is to understand the frequency of 86 in 9791.

Step 1:
The number 86 fits into 9 0 times, leaving a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Append the next digit (7) from the dividend to 9 and continue with: 97 / 86

On to step 2:
86 goes into 97 1 times with a remainder of 11.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 86 from 97 to get 11.
Append the next digit (9) from the dividend to 11 and continue with: 119 / 86

On to step 3:
119 divided by 86 is 1 with a remainder of 33.
The next digit of our result is 1. 
Result so far: 11.0
If we take 86 away from 119, we end up with 33.
Fetch the next digit (1) from the dividend, attach it to 33 and continue: 331 / 86

Moving on to step 4:
The number 86 fits into 331 3 times, leaving a remainder of 73.
Write down 3 as next digit of the result. 
Result so far: 113.0
Subtract 258 from 331 to get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Going ahead to step 5:
If we divide 730 by 86, we get 8 and a remainder of 42.
Use 8 as the next digit of our solution. 
Result so far: 113.8
If we take 688 away from 730, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 6:
86 can be fit into 420 4 times, resulting in a remainder of 76.
Use 4 as the next digit of our solution. 
Result so far: 113.84
Subtracting 344 from 420 leaves us with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 7:
When dividing 760 by 86, we get 8 with a remainder of 72.
Use 8 as the next digit of our solution. 
Result so far: 113.848
Subtract 688 from 760 to get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Let's proceed to step 8:
The number 86 fits into 720 8 times, leaving a remainder of 32.
Put 8 as the next digit of the answer. 
Result so far: 113.8488
Deduct 688 from 720 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

After the division, we end up with 113.8488 and a remainder of 0.00032.