210879 ÷ 11 
The aim is to understand the frequency of 11 in 210879.

Going ahead to step 1:
When dividing 2 by 11, we get 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 11

Moving on to step 2:
When dividing 21 by 11, we get 1 with a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 11 from 21, we get 10.
Append the next digit (0) from the dividend to 10 and continue with: 100 / 11

Let's proceed to step 3:
11 goes into 100 9 times with a remainder of 1.
The next digit of our result is 9. 
Result so far: 19.0
If we take 99 away from 100, we end up with 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 11

Advancing to step 4:
11 goes into 18 1 times with a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 191.0
Deduct 11 from 18 and we're left with 7.
Bring next digit (7) of the dividend behind the 7 and repeat the process: 77 / 11

Step 5:
The number 11 fits into 77 7 times, leaving a remainder of 0.
Put 7 as the next digit of the answer. 
Result so far: 1917.0
If we subtract 77 from 77, we get 0.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 11

On to step 6:
When dividing 9 by 11, we get 0 with a remainder of 9.
The next digit of our result is 0. 
Result so far: 19170.0
Subtract 0 from 9 to 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.

Advancing to step 7:
11 can be fit into 90 8 times, resulting in a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 19170.8
Subtracting 88 from 90 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 8:
20 divided by 11 is 1 with a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 19170.81
If we subtract 11 from 20, 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.

Moving on to step 9:
If we divide 90 by 11, we get 8 and a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 19170.818
If we subtract 88 from 90, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 10:
If we divide 20 by 11, we get 1 and a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 19170.8181
If we subtract 11 from 20, 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.

Advancing to step 11:
The number 11 fits into 90 8 times, leaving a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 19170.81818
Subtract 88 from 90 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 12:
If we divide 20 by 11, we get 1 and a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 19170.818181
Subtracting 11 from 20 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 13:
If we divide 90 by 11, we get 8 and a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 19170.8181818
The remainder is 2 after subtracting 88 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 14:
The number 11 fits into 20 1 times, leaving a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 19170.81818181
The remainder is 9 after subtracting 11 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Our division results in 19170.81818181 with a remaining 9e-09.