780324 ÷ 91 
The aim is to understand the frequency of 91 in 780324.

Moving on to step 1:
91 can be fit into 7 0 times, resulting in a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 91

Let's proceed to step 2:
91 can be fit into 78 0 times, resulting in a remainder of 78.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 78 after subtracting 0 from 78.
Bring next digit (0) of the dividend behind the 78 and repeat the process: 780 / 91

Step 3:
91 can be fit into 780 8 times, resulting in a remainder of 52.
The next digit of our result is 8. 
Result so far: 8.0
Subtract 728 from 780 to get 52.
Include the next digit (3) from the dividend after 52, then repeat: 523 / 91

Let's proceed to step 4:
523 divided by 91 is 5 with a remainder of 68.
Record the quotient 5 as the next digit in the result. 
Result so far: 85.0
The remainder is 68 after subtracting 455 from 523.
Take the next digit (2) from the dividend and append it to 68, then repeat: 682 / 91

Step 5:
When dividing 682 by 91, we get 7 with a remainder of 45.
The next digit of our result is 7. 
Result so far: 857.0
Subtracting 637 from 682 leaves us with 45.
Bring next digit (4) of the dividend behind the 45 and repeat the process: 454 / 91

Advancing to step 6:
The number 91 fits into 454 4 times, leaving a remainder of 90.
Use 4 as the next digit of our solution. 
Result so far: 8574.0
The remainder is 90 after subtracting 364 from 454.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

On to step 7:
900 divided by 91 is 9 with a remainder of 81.
Use 9 as the next digit of our solution. 
Result so far: 8574.9
Subtracting 819 from 900 leaves us with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Step 8:
91 goes into 810 8 times with a remainder of 82.
Put 8 as the next digit of the answer. 
Result so far: 8574.98
Subtracting 728 from 810 leaves us with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Step 9:
820 divided by 91 is 9 with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 8574.989
Deduct 819 from 820 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 10:
The number 91 fits into 10 0 times, leaving a remainder of 10.
The next digit of our result is 0. 
Result so far: 8574.989
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 11:
91 goes into 100 1 times with a remainder of 9.
The next digit of our result is 1. 
Result so far: 8574.98901
If we subtract 91 from 100, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 12:
91 goes into 90 0 times with a remainder of 90.
The number 0 becomes the next digit in our result. 
Result so far: 8574.98901
The remainder is 90 after subtracting 0 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Moving on to step 13:
The number 91 fits into 900 9 times, leaving a remainder of 81.
The next digit of our result is 9. 
Result so far: 8574.9890109
If we take 819 away from 900, we end up with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Moving on to step 14:
91 goes into 810 8 times with a remainder of 82.
The number 8 becomes the next digit in our result. 
Result so far: 8574.98901098
Deduct 728 from 810 and we're left with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

The quotient of the division is 8574.98901098, and the remainder is 8.2e-08.