We look at the division of 906767 by 91 
The aim is to understand the frequency of 91 in 906767.

Step 1:
91 goes into 9 0 times with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 91

Step 2:
The number 91 fits into 90 0 times, leaving a remainder of 90.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 90 and we're left with 90.
Append the next digit (6) from the dividend to 90 and continue with: 906 / 91

Step 3:
906 divided by 91 is 9 with a remainder of 87.
The next digit of our result is 9. 
Result so far: 9.0
If we take 819 away from 906, we end up with 87.
Fetch the next digit (7) from the dividend, attach it to 87 and continue: 877 / 91

Moving on to step 4:
91 can be fit into 877 9 times, resulting in a remainder of 58.
Write down 9 as next digit of the result. 
Result so far: 99.0
If we subtract 819 from 877, we get 58.
Append the next digit (6) from the dividend to 58 and continue with: 586 / 91

Going ahead to step 5:
91 can be fit into 586 6 times, resulting in a remainder of 40.
Record the quotient 6 as the next digit in the result. 
Result so far: 996.0
Deduct 546 from 586 and we're left with 40.
Take the next digit (7) from the dividend and append it to 40, then repeat: 407 / 91

Step 6:
When dividing 407 by 91, we get 4 with a remainder of 43.
The next digit of our result is 4. 
Result so far: 9964.0
Subtracting 364 from 407 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Moving on to step 7:
If we divide 430 by 91, we get 4 and a remainder of 66.
Put 4 as the next digit of the answer. 
Result so far: 9964.4
If we subtract 364 from 430, we get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Moving on to step 8:
When dividing 660 by 91, we get 7 with a remainder of 23.
The number 7 becomes the next digit in our result. 
Result so far: 9964.47
If we take 637 away from 660, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Advancing to step 9:
The number 91 fits into 230 2 times, leaving a remainder of 48.
Put 2 as the next digit of the answer. 
Result so far: 9964.472
Subtracting 182 from 230 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 10:
If we divide 480 by 91, we get 5 and a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 9964.4725
Subtract 455 from 480 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 11:
91 goes into 250 2 times with a remainder of 68.
The next digit of our result is 2. 
Result so far: 9964.47252
If we subtract 182 from 250, we get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

On to step 12:
When dividing 680 by 91, we get 7 with a remainder of 43.
The number 7 becomes the next digit in our result. 
Result so far: 9964.472527
Subtract 637 from 680 to get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Going ahead to step 13:
91 can be fit into 430 4 times, resulting in a remainder of 66.
Write down 4 as next digit of the result. 
Result so far: 9964.4725274
The remainder is 66 after subtracting 364 from 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

On to step 14:
660 divided by 91 is 7 with a remainder of 23.
Record the quotient 7 as the next digit in the result. 
Result so far: 9964.47252747
Deduct 637 from 660 and we're left with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

In conclusion, the division gives 9964.47252747 with a balance of 2.3e-08.