We look at the division of 211716 by 11 
The aim is to understand the frequency of 11 in 211716.

Advancing to step 1:
If we divide 2 by 11, we get 0 and a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 11

On to step 2:
The number 11 fits into 21 1 times, leaving a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 11 from 21 to get 10.
Take the next digit (1) from the dividend and append it to 10, then repeat: 101 / 11

Advancing to step 3:
When dividing 101 by 11, we get 9 with a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 19.0
If we take 99 away from 101, we end up with 2.
Fetch the next digit (7) from the dividend, attach it to 2 and continue: 27 / 11

Going ahead to step 4:
11 goes into 27 2 times with a remainder of 5.
Use 2 as the next digit of our solution. 
Result so far: 192.0
If we take 22 away from 27, we end up with 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 11

Going ahead to step 5:
If we divide 51 by 11, we get 4 and a remainder of 7.
Record the quotient 4 as the next digit in the result. 
Result so far: 1924.0
If we take 44 away from 51, we end up with 7.
Take the next digit (6) from the dividend and append it to 7, then repeat: 76 / 11

Moving on to step 6:
76 divided by 11 is 6 with a remainder of 10.
The next digit of our result is 6. 
Result so far: 19246.0
If we take 66 away from 76, we end up with 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 7:
If we divide 100 by 11, we get 9 and a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 19246.9
Deduct 99 from 100 and we're left 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 8:
11 can be fit into 10 0 times, resulting in a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 19246.9
If we subtract 0 from 10, we 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.

On to step 9:
When dividing 100 by 11, we get 9 with a remainder of 1.
The next digit of our result is 9. 
Result so far: 19246.909
If we take 99 away from 100, we end up 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 10:
When dividing 10 by 11, we get 0 with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 19246.909
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 11:
The number 11 fits into 100 9 times, leaving a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 19246.90909
Subtracting 99 from 100 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.

Moving on to step 12:
If we divide 10 by 11, we get 0 and a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 19246.90909
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.

Let's proceed to step 13:
If we divide 100 by 11, we get 9 and a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 19246.9090909
If we take 99 away from 100, we end up 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.

On to step 14:
11 goes into 10 0 times with a remainder of 10.
The next digit of our result is 0. 
Result so far: 19246.9090909
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 19246.9090909 with a remainder of 1e-08.