We look at the division of 681411 by 66 
The aim is to understand the frequency of 66 in 681411.

On to step 1:
66 can be fit into 6 0 times, resulting in a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Take the next digit (8) from the dividend and append it to 6, then repeat: 68 / 66

Moving on to step 2:
The number 66 fits into 68 1 times, leaving a remainder of 2.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 66 from 68 leaves us with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 66

Let's proceed to step 3:
When dividing 21 by 66, we get 0 with a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 10.0
If we take 0 away from 21, we end up with 21.
Fetch the next digit (4) from the dividend, attach it to 21 and continue: 214 / 66

Let's proceed to step 4:
66 goes into 214 3 times with a remainder of 16.
The next digit of our result is 3. 
Result so far: 103.0
If we subtract 198 from 214, we get 16.
Take the next digit (1) from the dividend and append it to 16, then repeat: 161 / 66

On to step 5:
66 can be fit into 161 2 times, resulting in a remainder of 29.
The number 2 becomes the next digit in our result. 
Result so far: 1032.0
If we subtract 132 from 161, we get 29.
Fetch the next digit (1) from the dividend, attach it to 29 and continue: 291 / 66

Let's proceed to step 6:
66 can be fit into 291 4 times, resulting in a remainder of 27.
The next digit of our result is 4. 
Result so far: 10324.0
If we take 264 away from 291, we end up with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Step 7:
66 can be fit into 270 4 times, resulting in a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 10324.4
Subtract 264 from 270 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.

Going ahead to step 8:
If we divide 60 by 66, we get 0 and a remainder of 60.
Record the quotient 0 as the next digit in the result. 
Result so far: 10324.4
Subtract 0 from 60 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 9:
The number 66 fits into 600 9 times, leaving a remainder of 6.
Write down 9 as next digit of the result. 
Result so far: 10324.409
Subtracting 594 from 600 leaves us 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 10:
The number 66 fits into 60 0 times, leaving a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 10324.409
The remainder is 60 after subtracting 0 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 11:
600 divided by 66 is 9 with a remainder of 6.
Put 9 as the next digit of the answer. 
Result so far: 10324.40909
If we subtract 594 from 600, 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.

On to step 12:
60 divided by 66 is 0 with a remainder of 60.
Use 0 as the next digit of our solution. 
Result so far: 10324.40909
If we take 0 away from 60, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 13:
66 goes into 600 9 times with a remainder of 6.
Write down 9 as next digit of the result. 
Result so far: 10324.4090909
The remainder is 6 after subtracting 594 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 14:
The number 66 fits into 60 0 times, leaving a remainder of 60.
Use 0 as the next digit of our solution. 
Result so far: 10324.4090909
If we take 0 away from 60, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

The final outcome is 10324.4090909, with a leftover of 6e-08.