Let's divide 420024 by 66
The aim is to understand the frequency of 66 in 420024.

On to step 1:
4 divided by 66 is 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 66

Moving on to step 2:
The number 66 fits into 42 0 times, leaving a remainder of 42.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 42, we end up with 42.
Include the next digit (0) from the dividend after 42, then repeat: 420 / 66

Going ahead to step 3:
When dividing 420 by 66, we get 6 with a remainder of 24.
The next digit of our result is 6. 
Result so far: 6.0
Subtract 396 from 420 to get 24.
Fetch the next digit (0) from the dividend, attach it to 24 and continue: 240 / 66

Let's proceed to step 4:
When dividing 240 by 66, we get 3 with a remainder of 42.
Record the quotient 3 as the next digit in the result. 
Result so far: 63.0
Subtract 198 from 240 to get 42.
Include the next digit (2) from the dividend after 42, then repeat: 422 / 66

On to step 5:
66 goes into 422 6 times with a remainder of 26.
The number 6 becomes the next digit in our result. 
Result so far: 636.0
The remainder is 26 after subtracting 396 from 422.
Fetch the next digit (4) from the dividend, attach it to 26 and continue: 264 / 66

On to step 6:
66 goes into 264 4 times with a remainder of 0.
The next digit of our result is 4. 
Result so far: 6364.0
If we subtract 264 from 264, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 7:
When dividing 0 by 66, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 6364.0
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
When dividing 0 by 66, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 6364.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 6364.0 and a remainder of 0.0.