We're dividing 507828 by 91 
The aim is to understand the frequency of 91 in 507828.

Let's proceed to step 1:
91 can be fit into 5 0 times, resulting in a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Append the next digit (0) from the dividend to 5 and continue with: 50 / 91

Moving on to step 2:
91 can be fit into 50 0 times, resulting in a remainder of 50.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 50 to get 50.
Take the next digit (7) from the dividend and append it to 50, then repeat: 507 / 91

Advancing to step 3:
The number 91 fits into 507 5 times, leaving a remainder of 52.
Write down 5 as next digit of the result. 
Result so far: 5.0
Subtracting 455 from 507 leaves us with 52.
Take the next digit (8) from the dividend and append it to 52, then repeat: 528 / 91

Going ahead to step 4:
528 divided by 91 is 5 with a remainder of 73.
Put 5 as the next digit of the answer. 
Result so far: 55.0
Deduct 455 from 528 and we're left with 73.
Grab the next digit (2) from the dividend, add it to 73, then carry on: 732 / 91

Advancing to step 5:
The number 91 fits into 732 8 times, leaving a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 558.0
If we take 728 away from 732, we end up with 4.
Grab the next digit (8) from the dividend, add it to 4, then carry on: 48 / 91

Step 6:
When dividing 48 by 91, we get 0 with a remainder of 48.
Use 0 as the next digit of our solution. 
Result so far: 5580.0
Subtract 0 from 48 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 7:
91 can be fit into 480 5 times, resulting in a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 5580.5
The remainder is 25 after subtracting 455 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 8:
The number 91 fits into 250 2 times, leaving a remainder of 68.
Use 2 as the next digit of our solution. 
Result so far: 5580.52
If we subtract 182 from 250, we get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Advancing to step 9:
680 divided by 91 is 7 with a remainder of 43.
Put 7 as the next digit of the answer. 
Result so far: 5580.527
If we subtract 637 from 680, we get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Going ahead to step 10:
If we divide 430 by 91, we get 4 and a remainder of 66.
The number 4 becomes the next digit in our result. 
Result so far: 5580.5274
Subtract 364 from 430 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Let's proceed to step 11:
660 divided by 91 is 7 with a remainder of 23.
The number 7 becomes the next digit in our result. 
Result so far: 5580.52747
If we subtract 637 from 660, we get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 12:
91 goes into 230 2 times with a remainder of 48.
Use 2 as the next digit of our solution. 
Result so far: 5580.527472
If we subtract 182 from 230, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 13:
The number 91 fits into 480 5 times, leaving a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 5580.5274725
Deduct 455 from 480 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 14:
If we divide 250 by 91, we get 2 and a remainder of 68.
Write down 2 as next digit of the result. 
Result so far: 5580.52747252
If we subtract 182 from 250, we get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Our division results in 5580.52747252 with a remaining 6.8e-08.