We look at the division of 643226 by 11 
The aim is to understand the frequency of 11 in 643226.

Advancing to step 1:
11 can be fit into 6 0 times, resulting in a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 11

Moving on to step 2:
When dividing 64 by 11, we get 5 with a remainder of 9.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Deduct 55 from 64 and we're left with 9.
Include the next digit (3) from the dividend after 9, then repeat: 93 / 11

Step 3:
When dividing 93 by 11, we get 8 with a remainder of 5.
Put 8 as the next digit of the answer. 
Result so far: 58.0
If we subtract 88 from 93, we get 5.
Take the next digit (2) from the dividend and append it to 5, then repeat: 52 / 11

On to step 4:
If we divide 52 by 11, we get 4 and a remainder of 8.
The next digit of our result is 4. 
Result so far: 584.0
If we take 44 away from 52, we end up with 8.
Append the next digit (2) from the dividend to 8 and continue with: 82 / 11

Step 5:
11 goes into 82 7 times with a remainder of 5.
Put 7 as the next digit of the answer. 
Result so far: 5847.0
If we take 77 away from 82, we end up with 5.
Grab the next digit (6) from the dividend, add it to 5, then carry on: 56 / 11

Let's proceed to step 6:
The number 11 fits into 56 5 times, leaving a remainder of 1.
The next digit of our result is 5. 
Result so far: 58475.0
Subtracting 55 from 56 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 7:
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: 58475.0
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.

Moving on to step 8:
When dividing 100 by 11, we get 9 with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 58475.09
If we subtract 99 from 100, we get 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 9:
10 divided by 11 is 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 58475.09
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.

Advancing to step 10:
When dividing 100 by 11, we get 9 with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 58475.0909
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.

Going ahead to step 11:
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: 58475.0909
The remainder is 10 after subtracting 0 from 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 12:
11 can be fit into 100 9 times, resulting in a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 58475.090909
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 13:
The number 11 fits into 10 0 times, leaving a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 58475.090909
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 14:
11 goes into 100 9 times with a remainder of 1.
The next digit of our result is 9. 
Result so far: 58475.09090909
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.

After the division, we end up with 58475.09090909 and a remainder of 1e-09.