Let's divide 66429117 by 660
The aim is to understand the frequency of 660 in 66429117.

Going ahead to step 1:
660 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 660

Moving on to step 2:
When dividing 66 by 660, we get 0 with a remainder of 66.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Append the next digit (4) from the dividend to 66 and continue with: 664 / 660

Moving on to step 3:
If we divide 664 by 660, we get 1 and a remainder of 4.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 660 from 664 to get 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 660

Let's proceed to step 4:
If we divide 42 by 660, we get 0 and a remainder of 42.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Deduct 0 from 42 and we're left with 42.
Include the next digit (9) from the dividend after 42, then repeat: 429 / 660

On to step 5:
The number 660 fits into 429 0 times, leaving a remainder of 429.
Use 0 as the next digit of our solution. 
Result so far: 100.0
If we take 0 away from 429, we end up with 429.
Include the next digit (1) from the dividend after 429, then repeat: 4291 / 660

Advancing to step 6:
The number 660 fits into 4291 6 times, leaving a remainder of 331.
Put 6 as the next digit of the answer. 
Result so far: 1006.0
Subtracting 3960 from 4291 leaves us with 331.
Append the next digit (1) from the dividend to 331 and continue with: 3311 / 660

On to step 7:
When dividing 3311 by 660, we get 5 with a remainder of 11.
Write down 5 as next digit of the result. 
Result so far: 10065.0
Subtracting 3300 from 3311 leaves us with 11.
Take the next digit (7) from the dividend and append it to 11, then repeat: 117 / 660

Going ahead to step 8:
660 goes into 117 0 times with a remainder of 117.
Use 0 as the next digit of our solution. 
Result so far: 100650.0
Subtract 0 from 117 to get 117.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1170, and continue the process.

Going ahead to step 9:
If we divide 1170 by 660, we get 1 and a remainder of 510.
Record the quotient 1 as the next digit in the result. 
Result so far: 100650.1
Subtracting 660 from 1170 leaves us with 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

Step 10:
660 can be fit into 5100 7 times, resulting in a remainder of 480.
The next digit of our result is 7. 
Result so far: 100650.17
Subtracting 4620 from 5100 leaves us with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Moving on to step 11:
660 goes into 4800 7 times with a remainder of 180.
Use 7 as the next digit of our solution. 
Result so far: 100650.177
The remainder is 180 after subtracting 4620 from 4800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Our division results in 100650.177 with a remaining 0.018.