We divide 512712 by 66
The aim is to understand the frequency of 66 in 512712.

Step 1:
5 divided by 66 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 66

On to step 2:
51 divided by 66 is 0 with a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Grab the next digit (2) from the dividend, add it to 51, then carry on: 512 / 66

Advancing to step 3:
If we divide 512 by 66, we get 7 and a remainder of 50.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Deduct 462 from 512 and we're left with 50.
Bring next digit (7) of the dividend behind the 50 and repeat the process: 507 / 66

Advancing to step 4:
If we divide 507 by 66, we get 7 and a remainder of 45.
Put 7 as the next digit of the answer. 
Result so far: 77.0
If we take 462 away from 507, we end up with 45.
Bring next digit (1) of the dividend behind the 45 and repeat the process: 451 / 66

Moving on to step 5:
When dividing 451 by 66, we get 6 with a remainder of 55.
Write down 6 as next digit of the result. 
Result so far: 776.0
If we subtract 396 from 451, we get 55.
Append the next digit (2) from the dividend to 55 and continue with: 552 / 66

On to step 6:
If we divide 552 by 66, we get 8 and a remainder of 24.
The next digit of our result is 8. 
Result so far: 7768.0
Subtracting 528 from 552 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 7:
66 goes into 240 3 times with a remainder of 42.
Use 3 as the next digit of our solution. 
Result so far: 7768.3
Subtract 198 from 240 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 8:
When dividing 420 by 66, we get 6 with a remainder of 24.
The next digit of our result is 6. 
Result so far: 7768.36
Subtracting 396 from 420 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 9:
240 divided by 66 is 3 with a remainder of 42.
Put 3 as the next digit of the answer. 
Result so far: 7768.363
The remainder is 42 after subtracting 198 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 10:
When dividing 420 by 66, we get 6 with a remainder of 24.
Put 6 as the next digit of the answer. 
Result so far: 7768.3636
Subtracting 396 from 420 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 11:
66 can be fit into 240 3 times, resulting in a remainder of 42.
Use 3 as the next digit of our solution. 
Result so far: 7768.36363
Subtracting 198 from 240 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 12:
When dividing 420 by 66, we get 6 with a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 7768.363636
Subtracting 396 from 420 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 13:
When dividing 240 by 66, we get 3 with a remainder of 42.
The number 3 becomes the next digit in our result. 
Result so far: 7768.3636363
If we subtract 198 from 240, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 14:
420 divided by 66 is 6 with a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 7768.36363636
The remainder is 24 after subtracting 396 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

The final outcome is 7768.36363636, with a leftover of 2.4e-08.