We're dividing 681853 by 91 
The aim is to understand the frequency of 91 in 681853.

Step 1:
The number 91 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Take the next digit (8) from the dividend and append it to 6, then repeat: 68 / 91

Advancing to step 2:
68 divided by 91 is 0 with a remainder of 68.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 68, we get 68.
Take the next digit (1) from the dividend and append it to 68, then repeat: 681 / 91

Step 3:
91 can be fit into 681 7 times, resulting in a remainder of 44.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we take 637 away from 681, we end up with 44.
Grab the next digit (8) from the dividend, add it to 44, then carry on: 448 / 91

Let's proceed to step 4:
When dividing 448 by 91, we get 4 with a remainder of 84.
Put 4 as the next digit of the answer. 
Result so far: 74.0
If we subtract 364 from 448, we get 84.
Include the next digit (5) from the dividend after 84, then repeat: 845 / 91

Step 5:
91 goes into 845 9 times with a remainder of 26.
Write down 9 as next digit of the result. 
Result so far: 749.0
Deduct 819 from 845 and we're left with 26.
Include the next digit (3) from the dividend after 26, then repeat: 263 / 91

Advancing to step 6:
If we divide 263 by 91, we get 2 and a remainder of 81.
Put 2 as the next digit of the answer. 
Result so far: 7492.0
The remainder is 81 after subtracting 182 from 263.
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 7:
810 divided by 91 is 8 with a remainder of 82.
Record the quotient 8 as the next digit in the result. 
Result so far: 7492.8
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.

Step 8:
If we divide 820 by 91, we get 9 and a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 7492.89
Subtracting 819 from 820 leaves us 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.

Step 9:
The number 91 fits into 10 0 times, leaving a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 7492.89
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 10:
If we divide 100 by 91, we get 1 and a remainder of 9.
The next digit of our result is 1. 
Result so far: 7492.8901
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.

Step 11:
The number 91 fits into 90 0 times, leaving a remainder of 90.
Use 0 as the next digit of our solution. 
Result so far: 7492.8901
If we take 0 away from 90, we end up with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Let's proceed to step 12:
When dividing 900 by 91, we get 9 with a remainder of 81.
The number 9 becomes the next digit in our result. 
Result so far: 7492.890109
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.

Moving on to step 13:
91 goes into 810 8 times with a remainder of 82.
The next digit of our result is 8. 
Result so far: 7492.8901098
If we take 728 away from 810, we end up 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.

On to step 14:
91 can be fit into 820 9 times, resulting in a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 7492.89010989
The remainder is 1 after subtracting 819 from 820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final result is 7492.89010989 with a remainder of 1e-09.