598299 ÷ 91 
The aim is to understand the frequency of 91 in 598299.

Let's proceed to step 1:
When dividing 5 by 91, we get 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Take the next digit (9) from the dividend and append it to 5, then repeat: 59 / 91

Let's proceed to step 2:
91 goes into 59 0 times with a remainder of 59.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 59 after subtracting 0 from 59.
Include the next digit (8) from the dividend after 59, then repeat: 598 / 91

Moving on to step 3:
91 goes into 598 6 times with a remainder of 52.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
If we subtract 546 from 598, we get 52.
Include the next digit (2) from the dividend after 52, then repeat: 522 / 91

On to step 4:
The number 91 fits into 522 5 times, leaving a remainder of 67.
The number 5 becomes the next digit in our result. 
Result so far: 65.0
Deduct 455 from 522 and we're left with 67.
Bring next digit (9) of the dividend behind the 67 and repeat the process: 679 / 91

Moving on to step 5:
If we divide 679 by 91, we get 7 and a remainder of 42.
Record the quotient 7 as the next digit in the result. 
Result so far: 657.0
Deduct 637 from 679 and we're left with 42.
Include the next digit (9) from the dividend after 42, then repeat: 429 / 91

Going ahead to step 6:
When dividing 429 by 91, we get 4 with a remainder of 65.
The next digit of our result is 4. 
Result so far: 6574.0
Subtracting 364 from 429 leaves us with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Going ahead to step 7:
When dividing 650 by 91, we get 7 with a remainder of 13.
The next digit of our result is 7. 
Result so far: 6574.7
Subtracting 637 from 650 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 8:
91 can be fit into 130 1 times, resulting in a remainder of 39.
Use 1 as the next digit of our solution. 
Result so far: 6574.71
The remainder is 39 after subtracting 91 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 9:
390 divided by 91 is 4 with a remainder of 26.
The number 4 becomes the next digit in our result. 
Result so far: 6574.714
The remainder is 26 after subtracting 364 from 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

On to step 10:
260 divided by 91 is 2 with a remainder of 78.
Use 2 as the next digit of our solution. 
Result so far: 6574.7142
Subtract 182 from 260 to get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Moving on to step 11:
If we divide 780 by 91, we get 8 and a remainder of 52.
Put 8 as the next digit of the answer. 
Result so far: 6574.71428
The remainder is 52 after subtracting 728 from 780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 12:
When dividing 520 by 91, we get 5 with a remainder of 65.
The next digit of our result is 5. 
Result so far: 6574.714285
If we subtract 455 from 520, we get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Let's proceed to step 13:
91 can be fit into 650 7 times, resulting in a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 6574.7142857
Subtract 637 from 650 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 14:
91 can be fit into 130 1 times, resulting in a remainder of 39.
Put 1 as the next digit of the answer. 
Result so far: 6574.71428571
Subtracting 91 from 130 leaves us with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

After the division, we end up with 6574.71428571 and a remainder of 3.9e-08.