528093 divided by 91 
The aim is to understand the frequency of 91 in 528093.

Going ahead to step 1:
The number 91 fits into 5 0 times, leaving a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 91

Let's proceed to step 2:
The number 91 fits into 52 0 times, leaving a remainder of 52.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 52 and we're left with 52.
Grab the next digit (8) from the dividend, add it to 52, then carry on: 528 / 91

Step 3:
91 can be fit into 528 5 times, resulting in a remainder of 73.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtract 455 from 528 to get 73.
Append the next digit (0) from the dividend to 73 and continue with: 730 / 91

Going ahead to step 4:
If we divide 730 by 91, we get 8 and a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 58.0
Subtracting 728 from 730 leaves us with 2.
Take the next digit (9) from the dividend and append it to 2, then repeat: 29 / 91

On to step 5:
91 goes into 29 0 times with a remainder of 29.
The next digit of our result is 0. 
Result so far: 580.0
If we subtract 0 from 29, we get 29.
Append the next digit (3) from the dividend to 29 and continue with: 293 / 91

Step 6:
The number 91 fits into 293 3 times, leaving a remainder of 20.
The next digit of our result is 3. 
Result so far: 5803.0
If we subtract 273 from 293, we 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.

Moving on to step 7:
The number 91 fits into 200 2 times, leaving a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 5803.2
If we take 182 away from 200, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 8:
91 can be fit into 180 1 times, resulting in a remainder of 89.
The next digit of our result is 1. 
Result so far: 5803.21
Subtract 91 from 180 to get 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Advancing to step 9:
When dividing 890 by 91, we get 9 with a remainder of 71.
Put 9 as the next digit of the answer. 
Result so far: 5803.219
Deduct 819 from 890 and we're left with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

On to step 10:
91 goes into 710 7 times with a remainder of 73.
Write down 7 as next digit of the result. 
Result so far: 5803.2197
If we subtract 637 from 710, we 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 11:
When dividing 730 by 91, we get 8 with a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 5803.21978
Subtracting 728 from 730 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 12:
20 divided by 91 is 0 with a remainder of 20.
The next digit of our result is 0. 
Result so far: 5803.21978
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 13:
91 can be fit into 200 2 times, resulting in a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 5803.2197802
The remainder is 18 after subtracting 182 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 14:
The number 91 fits into 180 1 times, leaving a remainder of 89.
The next digit of our result is 1. 
Result so far: 5803.21978021
The remainder is 89 after subtracting 91 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

The final outcome is 5803.21978021, with a leftover of 8.9e-08.