We divide 143660 by 66
The aim is to understand the frequency of 66 in 143660.

On to step 1:
66 can be fit into 1 0 times, resulting in a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Fetch the next digit (4) from the dividend, attach it to 1 and continue: 14 / 66

Going ahead to step 2:
66 can be fit into 14 0 times, resulting in a remainder of 14.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 14, we get 14.
Fetch the next digit (3) from the dividend, attach it to 14 and continue: 143 / 66

Moving on to step 3:
66 can be fit into 143 2 times, resulting in a remainder of 11.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtract 132 from 143 to get 11.
Append the next digit (6) from the dividend to 11 and continue with: 116 / 66

On to step 4:
66 goes into 116 1 times with a remainder of 50.
Put 1 as the next digit of the answer. 
Result so far: 21.0
Subtract 66 from 116 to get 50.
Bring next digit (6) of the dividend behind the 50 and repeat the process: 506 / 66

Advancing to step 5:
The number 66 fits into 506 7 times, leaving a remainder of 44.
Use 7 as the next digit of our solution. 
Result so far: 217.0
The remainder is 44 after subtracting 462 from 506.
Append the next digit (0) from the dividend to 44 and continue with: 440 / 66

Advancing to step 6:
66 goes into 440 6 times with a remainder of 44.
Write down 6 as next digit of the result. 
Result so far: 2176.0
Deduct 396 from 440 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Let's proceed to step 7:
If we divide 440 by 66, we get 6 and a remainder of 44.
Put 6 as the next digit of the answer. 
Result so far: 2176.6
The remainder is 44 after subtracting 396 from 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Let's proceed to step 8:
66 can be fit into 440 6 times, resulting in a remainder of 44.
Put 6 as the next digit of the answer. 
Result so far: 2176.66
Subtracting 396 from 440 leaves us with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

In conclusion, the division gives 2176.66 with a balance of 0.044.