91878 divided by 11 
The aim is to understand the frequency of 11 in 91878.

Moving on to step 1:
When dividing 9 by 11, we get 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Include the next digit (1) from the dividend after 9, then repeat: 91 / 11

Going ahead to step 2:
11 can be fit into 91 8 times, resulting in a remainder of 3.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Deduct 88 from 91 and we're left with 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 11

On to step 3:
The number 11 fits into 38 3 times, leaving a remainder of 5.
Write down 3 as next digit of the result. 
Result so far: 83.0
If we subtract 33 from 38, we get 5.
Fetch the next digit (7) from the dividend, attach it to 5 and continue: 57 / 11

Advancing to step 4:
The number 11 fits into 57 5 times, leaving a remainder of 2.
The next digit of our result is 5. 
Result so far: 835.0
Subtracting 55 from 57 leaves us with 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 11

Step 5:
If we divide 28 by 11, we get 2 and a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 8352.0
If we take 22 away from 28, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 6:
If we divide 60 by 11, we get 5 and a remainder of 5.
The next digit of our result is 5. 
Result so far: 8352.5
If we subtract 55 from 60, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 7:
The number 11 fits into 50 4 times, leaving a remainder of 6.
The next digit of our result is 4. 
Result so far: 8352.54
The remainder is 6 after subtracting 44 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 8:
The number 11 fits into 60 5 times, leaving a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 8352.545
Subtracting 55 from 60 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 9:
When dividing 50 by 11, we get 4 with a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 8352.5454
If we subtract 44 from 50, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 10:
11 goes into 60 5 times with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 8352.54545
If we subtract 55 from 60, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 11:
11 goes into 50 4 times with a remainder of 6.
Put 4 as the next digit of the answer. 
Result so far: 8352.545454
Subtract 44 from 50 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 12:
60 divided by 11 is 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 8352.5454545
Subtracting 55 from 60 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 13:
If we divide 50 by 11, we get 4 and a remainder of 6.
The next digit of our result is 4. 
Result so far: 8352.54545454
If we take 44 away from 50, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Our division results in 8352.54545454 with a remaining 6e-09.