835438 ÷ 91 
The aim is to understand the frequency of 91 in 835438.

Let's proceed to 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
If we subtract 0 from 8, we get 8.
Take the next digit (3) from the dividend and append it to 8, then repeat: 83 / 91

On to step 2:
If we divide 83 by 91, we get 0 and a remainder of 83.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 83 and we're left with 83.
Bring next digit (5) of the dividend behind the 83 and repeat the process: 835 / 91

Moving on to step 3:
91 goes into 835 9 times with a remainder of 16.
The next digit of our result is 9. 
Result so far: 9.0
If we subtract 819 from 835, we get 16.
Append the next digit (4) from the dividend to 16 and continue with: 164 / 91

Going ahead to step 4:
91 can be fit into 164 1 times, resulting in a remainder of 73.
The next digit of our result is 1. 
Result so far: 91.0
Deduct 91 from 164 and we're left with 73.
Fetch the next digit (3) from the dividend, attach it to 73 and continue: 733 / 91

Going ahead to step 5:
If we divide 733 by 91, we get 8 and a remainder of 5.
Put 8 as the next digit of the answer. 
Result so far: 918.0
If we take 728 away from 733, we end up with 5.
Grab the next digit (8) from the dividend, add it to 5, then carry on: 58 / 91

On to step 6:
91 can be fit into 58 0 times, resulting in a remainder of 58.
Use 0 as the next digit of our solution. 
Result so far: 9180.0
The remainder is 58 after subtracting 0 from 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Step 7:
When dividing 580 by 91, we get 6 with a remainder of 34.
Write down 6 as next digit of the result. 
Result so far: 9180.6
Subtract 546 from 580 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 8:
91 can be fit into 340 3 times, resulting in a remainder of 67.
Put 3 as the next digit of the answer. 
Result so far: 9180.63
If we take 273 away from 340, we end up with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Step 9:
If we divide 670 by 91, we get 7 and a remainder of 33.
The next digit of our result is 7. 
Result so far: 9180.637
The remainder is 33 after subtracting 637 from 670.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Moving on to step 10:
The number 91 fits into 330 3 times, leaving a remainder of 57.
Write down 3 as next digit of the result. 
Result so far: 9180.6373
Subtracting 273 from 330 leaves us with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Advancing to step 11:
When dividing 570 by 91, we get 6 with a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 9180.63736
Subtract 546 from 570 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 12:
91 can be fit into 240 2 times, resulting in a remainder of 58.
Use 2 as the next digit of our solution. 
Result so far: 9180.637362
If we take 182 away from 240, we end up with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 13:
If we divide 580 by 91, we get 6 and a remainder of 34.
Put 6 as the next digit of the answer. 
Result so far: 9180.6373626
The remainder is 34 after subtracting 546 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 14:
The number 91 fits into 340 3 times, leaving a remainder of 67.
Put 3 as the next digit of the answer. 
Result so far: 9180.63736263
If we take 273 away from 340, we end up with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

In conclusion, the division gives 9180.63736263 with a balance of 6.7e-08.