We're dividing 865315 by 91 
The aim is to understand the frequency of 91 in 865315.

Moving on to step 1:
The number 91 fits into 8 0 times, leaving a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 91

On to step 2:
If we divide 86 by 91, we get 0 and a remainder of 86.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 86 and we're left with 86.
Fetch the next digit (5) from the dividend, attach it to 86 and continue: 865 / 91

On to step 3:
865 divided by 91 is 9 with a remainder of 46.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Subtracting 819 from 865 leaves us with 46.
Take the next digit (3) from the dividend and append it to 46, then repeat: 463 / 91

Let's proceed to step 4:
91 goes into 463 5 times with a remainder of 8.
The number 5 becomes the next digit in our result. 
Result so far: 95.0
Deduct 455 from 463 and we're left with 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 91

Going ahead to step 5:
When dividing 81 by 91, we get 0 with a remainder of 81.
The next digit of our result is 0. 
Result so far: 950.0
Subtracting 0 from 81 leaves us with 81.
Grab the next digit (5) from the dividend, add it to 81, then carry on: 815 / 91

Advancing to step 6:
91 can be fit into 815 8 times, resulting in a remainder of 87.
Write down 8 as next digit of the result. 
Result so far: 9508.0
If we take 728 away from 815, we end up with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Step 7:
The number 91 fits into 870 9 times, leaving a remainder of 51.
Put 9 as the next digit of the answer. 
Result so far: 9508.9
Subtracting 819 from 870 leaves us 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.

On to step 8:
91 can be fit into 510 5 times, resulting in a remainder of 55.
The next digit of our result is 5. 
Result so far: 9508.95
Subtract 455 from 510 to get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Going ahead to step 9:
When dividing 550 by 91, we get 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 9508.956
If we subtract 546 from 550, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 10:
When dividing 40 by 91, we get 0 with a remainder of 40.
The next digit of our result is 0. 
Result so far: 9508.956
The remainder is 40 after subtracting 0 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 11:
91 goes into 400 4 times with a remainder of 36.
The number 4 becomes the next digit in our result. 
Result so far: 9508.95604
If we subtract 364 from 400, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 12:
When dividing 360 by 91, we get 3 with a remainder of 87.
Put 3 as the next digit of the answer. 
Result so far: 9508.956043
Subtract 273 from 360 to get 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Moving on to step 13:
870 divided by 91 is 9 with a remainder of 51.
Use 9 as the next digit of our solution. 
Result so far: 9508.9560439
The remainder is 51 after subtracting 819 from 870.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Step 14:
91 goes into 510 5 times with a remainder of 55.
The number 5 becomes the next digit in our result. 
Result so far: 9508.95604395
Subtracting 455 from 510 leaves us with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

The quotient of the division is 9508.95604395, and the remainder is 5.5e-08.