Let's divide 559636 by 66
The aim is to understand the frequency of 66 in 559636.

On to step 1:
If we divide 5 by 66, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Take the next digit (5) from the dividend and append it to 5, then repeat: 55 / 66

On to step 2:
66 can be fit into 55 0 times, resulting in a remainder of 55.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 55, we get 55.
Grab the next digit (9) from the dividend, add it to 55, then carry on: 559 / 66

Moving on to step 3:
66 goes into 559 8 times with a remainder of 31.
The next digit of our result is 8. 
Result so far: 8.0
Subtract 528 from 559 to get 31.
Grab the next digit (6) from the dividend, add it to 31, then carry on: 316 / 66

Step 4:
316 divided by 66 is 4 with a remainder of 52.
Record the quotient 4 as the next digit in the result. 
Result so far: 84.0
Deduct 264 from 316 and we're left with 52.
Append the next digit (3) from the dividend to 52 and continue with: 523 / 66

Step 5:
523 divided by 66 is 7 with a remainder of 61.
Write down 7 as next digit of the result. 
Result so far: 847.0
The remainder is 61 after subtracting 462 from 523.
Include the next digit (6) from the dividend after 61, then repeat: 616 / 66

On to step 6:
If we divide 616 by 66, we get 9 and a remainder of 22.
The number 9 becomes the next digit in our result. 
Result so far: 8479.0
Subtracting 594 from 616 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 7:
The number 66 fits into 220 3 times, leaving a remainder of 22.
The number 3 becomes the next digit in our result. 
Result so far: 8479.3
Subtract 198 from 220 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 8:
If we divide 220 by 66, we get 3 and a remainder of 22.
Put 3 as the next digit of the answer. 
Result so far: 8479.33
Subtract 198 from 220 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

The quotient of the division is 8479.33, and the remainder is 0.022.