We look at the division of 472505 by 66 
The aim is to understand the frequency of 66 in 472505.

Step 1:
4 divided by 66 is 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Bring next digit (7) of the dividend behind the 4 and repeat the process: 47 / 66

Step 2:
When dividing 47 by 66, we get 0 with a remainder of 47.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 47 and we're left with 47.
Take the next digit (2) from the dividend and append it to 47, then repeat: 472 / 66

Step 3:
When dividing 472 by 66, we get 7 with a remainder of 10.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we subtract 462 from 472, we get 10.
Append the next digit (5) from the dividend to 10 and continue with: 105 / 66

On to step 4:
When dividing 105 by 66, we get 1 with a remainder of 39.
Record the quotient 1 as the next digit in the result. 
Result so far: 71.0
Deduct 66 from 105 and we're left with 39.
Grab the next digit (0) from the dividend, add it to 39, then carry on: 390 / 66

Step 5:
The number 66 fits into 390 5 times, leaving a remainder of 60.
Use 5 as the next digit of our solution. 
Result so far: 715.0
If we subtract 330 from 390, we get 60.
Fetch the next digit (5) from the dividend, attach it to 60 and continue: 605 / 66

Moving on to step 6:
66 can be fit into 605 9 times, resulting in a remainder of 11.
The next digit of our result is 9. 
Result so far: 7159.0
Subtracting 594 from 605 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 7:
When dividing 110 by 66, we get 1 with a remainder of 44.
The number 1 becomes the next digit in our result. 
Result so far: 7159.1
The remainder is 44 after subtracting 66 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Advancing to step 8:
66 can be fit into 440 6 times, resulting in a remainder of 44.
Use 6 as the next digit of our solution. 
Result so far: 7159.16
If we subtract 396 from 440, we get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Step 9:
66 goes into 440 6 times with a remainder of 44.
Use 6 as the next digit of our solution. 
Result so far: 7159.166
Subtract 396 from 440 to get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

The final result is 7159.166 with a remainder of 0.0044.