91111105 divided by 216 
The aim is to understand the frequency of 216 in 91111105.

On to step 1:
216 goes into 9 0 times with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 216

Advancing to step 2:
When dividing 91 by 216, we get 0 with a remainder of 91.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 91 to get 91.
Bring next digit (1) of the dividend behind the 91 and repeat the process: 911 / 216

Going ahead to step 3:
When dividing 911 by 216, we get 4 with a remainder of 47.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 864 from 911 and we're left with 47.
Append the next digit (1) from the dividend to 47 and continue with: 471 / 216

Advancing to step 4:
When dividing 471 by 216, we get 2 with a remainder of 39.
The next digit of our result is 2. 
Result so far: 42.0
The remainder is 39 after subtracting 432 from 471.
Take the next digit (1) from the dividend and append it to 39, then repeat: 391 / 216

Moving on to step 5:
When dividing 391 by 216, we get 1 with a remainder of 175.
Put 1 as the next digit of the answer. 
Result so far: 421.0
If we take 216 away from 391, we end up with 175.
Include the next digit (1) from the dividend after 175, then repeat: 1751 / 216

On to step 6:
The number 216 fits into 1751 8 times, leaving a remainder of 23.
The next digit of our result is 8. 
Result so far: 4218.0
Deduct 1728 from 1751 and we're left with 23.
Take the next digit (0) from the dividend and append it to 23, then repeat: 230 / 216

Advancing to step 7:
If we divide 230 by 216, we get 1 and a remainder of 14.
Write down 1 as next digit of the result. 
Result so far: 42181.0
Subtracting 216 from 230 leaves us with 14.
Bring next digit (5) of the dividend behind the 14 and repeat the process: 145 / 216

Going ahead to step 8:
The number 216 fits into 145 0 times, leaving a remainder of 145.
Write down 0 as next digit of the result. 
Result so far: 421810.0
Subtract 0 from 145 to get 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Step 9:
216 can be fit into 1450 6 times, resulting in a remainder of 154.
The next digit of our result is 6. 
Result so far: 421810.6
If we take 1296 away from 1450, we end up with 154.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1540, and continue the process.

Moving on to step 10:
When dividing 1540 by 216, we get 7 with a remainder of 28.
Use 7 as the next digit of our solution. 
Result so far: 421810.67
If we take 1512 away from 1540, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 11:
216 goes into 280 1 times with a remainder of 64.
Write down 1 as next digit of the result. 
Result so far: 421810.671
Subtracting 216 from 280 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Step 12:
640 divided by 216 is 2 with a remainder of 208.
The next digit of our result is 2. 
Result so far: 421810.6712
If we subtract 432 from 640, we get 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

On to step 13:
216 goes into 2080 9 times with a remainder of 136.
Record the quotient 9 as the next digit in the result. 
Result so far: 421810.67129
If we subtract 1944 from 2080, we get 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Let's proceed to step 14:
216 goes into 1360 6 times with a remainder of 64.
Use 6 as the next digit of our solution. 
Result so far: 421810.671296
The remainder is 64 after subtracting 1296 from 1360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 15:
216 can be fit into 640 2 times, resulting in a remainder of 208.
Record the quotient 2 as the next digit in the result. 
Result so far: 421810.6712962
If we subtract 432 from 640, we get 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Going ahead to step 16:
When dividing 2080 by 216, we get 9 with a remainder of 136.
The next digit of our result is 9. 
Result so far: 421810.67129629
Subtracting 1944 from 2080 leaves us with 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

The quotient of the division is 421810.67129629, and the remainder is 1.36e-07.