We divide 803964 by 91
The aim is to understand the frequency of 91 in 803964.

Step 1:
91 goes into 8 0 times with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Fetch the next digit (0) from the dividend, attach it to 8 and continue: 80 / 91

Moving on to step 2:
If we divide 80 by 91, we get 0 and a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 80 after subtracting 0 from 80.
Take the next digit (3) from the dividend and append it to 80, then repeat: 803 / 91

Moving on to step 3:
91 goes into 803 8 times with a remainder of 75.
Write down 8 as next digit of the result. 
Result so far: 8.0
The remainder is 75 after subtracting 728 from 803.
Append the next digit (9) from the dividend to 75 and continue with: 759 / 91

Let's proceed to step 4:
If we divide 759 by 91, we get 8 and a remainder of 31.
Use 8 as the next digit of our solution. 
Result so far: 88.0
If we take 728 away from 759, we end up with 31.
Include the next digit (6) from the dividend after 31, then repeat: 316 / 91

Advancing to step 5:
91 can be fit into 316 3 times, resulting in a remainder of 43.
Record the quotient 3 as the next digit in the result. 
Result so far: 883.0
If we take 273 away from 316, we end up with 43.
Fetch the next digit (4) from the dividend, attach it to 43 and continue: 434 / 91

Let's proceed to step 6:
91 goes into 434 4 times with a remainder of 70.
Write down 4 as next digit of the result. 
Result so far: 8834.0
If we subtract 364 from 434, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 7:
The number 91 fits into 700 7 times, leaving a remainder of 63.
The number 7 becomes the next digit in our result. 
Result so far: 8834.7
If we take 637 away from 700, we end up with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

On to step 8:
When dividing 630 by 91, we get 6 with a remainder of 84.
The number 6 becomes the next digit in our result. 
Result so far: 8834.76
The remainder is 84 after subtracting 546 from 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Moving on to step 9:
840 divided by 91 is 9 with a remainder of 21.
Record the quotient 9 as the next digit in the result. 
Result so far: 8834.769
If we subtract 819 from 840, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 10:
91 goes into 210 2 times with a remainder of 28.
The next digit of our result is 2. 
Result so far: 8834.7692
If we subtract 182 from 210, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 11:
91 goes into 280 3 times with a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 8834.76923
If we take 273 away from 280, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 12:
When dividing 70 by 91, we get 0 with a remainder of 70.
Put 0 as the next digit of the answer. 
Result so far: 8834.76923
The remainder is 70 after subtracting 0 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 13:
When dividing 700 by 91, we get 7 with a remainder of 63.
Put 7 as the next digit of the answer. 
Result so far: 8834.7692307
Deduct 637 from 700 and we're left with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Moving on to step 14:
91 can be fit into 630 6 times, resulting in a remainder of 84.
The number 6 becomes the next digit in our result. 
Result so far: 8834.76923076
Subtracting 546 from 630 leaves us with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

In conclusion, the division gives 8834.76923076 with a balance of 8.4e-08.