We're dividing 636853 by 66 
The aim is to understand the frequency of 66 in 636853.

Step 1:
66 can be fit into 6 0 times, resulting in a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 66

Step 2:
The number 66 fits into 63 0 times, leaving a remainder of 63.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 63 leaves us with 63.
Take the next digit (6) from the dividend and append it to 63, then repeat: 636 / 66

Going ahead to step 3:
The number 66 fits into 636 9 times, leaving a remainder of 42.
Write down 9 as next digit of the result. 
Result so far: 9.0
Subtract 594 from 636 to get 42.
Bring next digit (8) of the dividend behind the 42 and repeat the process: 428 / 66

On to step 4:
428 divided by 66 is 6 with a remainder of 32.
Use 6 as the next digit of our solution. 
Result so far: 96.0
If we take 396 away from 428, we end up with 32.
Take the next digit (5) from the dividend and append it to 32, then repeat: 325 / 66

Step 5:
66 goes into 325 4 times with a remainder of 61.
Record the quotient 4 as the next digit in the result. 
Result so far: 964.0
The remainder is 61 after subtracting 264 from 325.
Take the next digit (3) from the dividend and append it to 61, then repeat: 613 / 66

Let's proceed to step 6:
66 goes into 613 9 times with a remainder of 19.
The next digit of our result is 9. 
Result so far: 9649.0
Subtracting 594 from 613 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 7:
66 can be fit into 190 2 times, resulting in a remainder of 58.
The number 2 becomes the next digit in our result. 
Result so far: 9649.2
Deduct 132 from 190 and we're left with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Step 8:
The number 66 fits into 580 8 times, leaving a remainder of 52.
Record the quotient 8 as the next digit in the result. 
Result so far: 9649.28
Subtracting 528 from 580 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 9:
66 goes into 520 7 times with a remainder of 58.
Use 7 as the next digit of our solution. 
Result so far: 9649.287
If we take 462 away from 520, we end up with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 10:
66 goes into 580 8 times with a remainder of 52.
The next digit of our result is 8. 
Result so far: 9649.2878
Subtract 528 from 580 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 11:
66 goes into 520 7 times with a remainder of 58.
Write down 7 as next digit of the result. 
Result so far: 9649.28787
The remainder is 58 after subtracting 462 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 12:
580 divided by 66 is 8 with a remainder of 52.
The next digit of our result is 8. 
Result so far: 9649.287878
Deduct 528 from 580 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 13:
If we divide 520 by 66, we get 7 and a remainder of 58.
Record the quotient 7 as the next digit in the result. 
Result so far: 9649.2878787
If we subtract 462 from 520, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 14:
580 divided by 66 is 8 with a remainder of 52.
Write down 8 as next digit of the result. 
Result so far: 9649.28787878
The remainder is 52 after subtracting 528 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

The final result is 9649.28787878 with a remainder of 5.2e-08.