Let's divide 7539 by 91
The aim is to understand the frequency of 91 in 7539.

Let's proceed to step 1:
91 can be fit into 7 0 times, resulting in a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Take the next digit (5) from the dividend and append it to 7, then repeat: 75 / 91

Moving on to step 2:
75 divided by 91 is 0 with a remainder of 75.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 75 leaves us with 75.
Fetch the next digit (3) from the dividend, attach it to 75 and continue: 753 / 91

Going ahead to step 3:
When dividing 753 by 91, we get 8 with a remainder of 25.
Write down 8 as next digit of the result. 
Result so far: 8.0
The remainder is 25 after subtracting 728 from 753.
Include the next digit (9) from the dividend after 25, then repeat: 259 / 91

Advancing to step 4:
The number 91 fits into 259 2 times, leaving a remainder of 77.
Record the quotient 2 as the next digit in the result. 
Result so far: 82.0
Subtracting 182 from 259 leaves us with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Moving on to step 5:
91 can be fit into 770 8 times, resulting in a remainder of 42.
Put 8 as the next digit of the answer. 
Result so far: 82.8
If we subtract 728 from 770, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 6:
91 goes into 420 4 times with a remainder of 56.
The number 4 becomes the next digit in our result. 
Result so far: 82.84
Subtract 364 from 420 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Advancing to step 7:
If we divide 560 by 91, we get 6 and a remainder of 14.
Put 6 as the next digit of the answer. 
Result so far: 82.846
The remainder is 14 after subtracting 546 from 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 8:
91 goes into 140 1 times with a remainder of 49.
Write down 1 as next digit of the result. 
Result so far: 82.8461
Subtracting 91 from 140 leaves us with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Step 9:
When dividing 490 by 91, we get 5 with a remainder of 35.
The number 5 becomes the next digit in our result. 
Result so far: 82.84615
Subtract 455 from 490 to 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.

Advancing to step 10:
350 divided by 91 is 3 with a remainder of 77.
The number 3 becomes the next digit in our result. 
Result so far: 82.846153
Subtracting 273 from 350 leaves us with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Step 11:
91 goes into 770 8 times with a remainder of 42.
Use 8 as the next digit of our solution. 
Result so far: 82.8461538
The remainder is 42 after subtracting 728 from 770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 12:
If we divide 420 by 91, we get 4 and a remainder of 56.
Use 4 as the next digit of our solution. 
Result so far: 82.84615384
Deduct 364 from 420 and we're left with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

After the division, we end up with 82.84615384 and a remainder of 5.6e-08.