We divide 518411 by 66
The aim is to understand the frequency of 66 in 518411.

On to step 1:
66 goes into 5 0 times with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 66

Moving on to step 2:
66 can be fit into 51 0 times, resulting in a remainder of 51.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 51, we get 51.
Take the next digit (8) from the dividend and append it to 51, then repeat: 518 / 66

Moving on to step 3:
66 goes into 518 7 times with a remainder of 56.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Subtracting 462 from 518 leaves us with 56.
Bring next digit (4) of the dividend behind the 56 and repeat the process: 564 / 66

Step 4:
If we divide 564 by 66, we get 8 and a remainder of 36.
Record the quotient 8 as the next digit in the result. 
Result so far: 78.0
If we take 528 away from 564, we end up with 36.
Append the next digit (1) from the dividend to 36 and continue with: 361 / 66

Moving on to step 5:
The number 66 fits into 361 5 times, leaving a remainder of 31.
The number 5 becomes the next digit in our result. 
Result so far: 785.0
Subtract 330 from 361 to get 31.
Append the next digit (1) from the dividend to 31 and continue with: 311 / 66

Moving on to step 6:
66 can be fit into 311 4 times, resulting in a remainder of 47.
Write down 4 as next digit of the result. 
Result so far: 7854.0
Subtract 264 from 311 to get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Going ahead to step 7:
66 goes into 470 7 times with a remainder of 8.
The number 7 becomes the next digit in our result. 
Result so far: 7854.7
Subtract 462 from 470 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 8:
66 goes into 80 1 times with a remainder of 14.
The next digit of our result is 1. 
Result so far: 7854.71
Subtract 66 from 80 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 9:
If we divide 140 by 66, we get 2 and a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 7854.712
If we subtract 132 from 140, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 10:
66 can be fit into 80 1 times, resulting in a remainder of 14.
The number 1 becomes the next digit in our result. 
Result so far: 7854.7121
Subtracting 66 from 80 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 11:
When dividing 140 by 66, we get 2 with a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 7854.71212
If we take 132 away from 140, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 12:
66 can be fit into 80 1 times, resulting in a remainder of 14.
The next digit of our result is 1. 
Result so far: 7854.712121
If we take 66 away from 80, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 13:
140 divided by 66 is 2 with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 7854.7121212
Subtract 132 from 140 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 14:
66 goes into 80 1 times with a remainder of 14.
Put 1 as the next digit of the answer. 
Result so far: 7854.71212121
The remainder is 14 after subtracting 66 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final outcome is 7854.71212121, with a leftover of 1.4e-08.