804749 divided by 66 
The aim is to understand the frequency of 66 in 804749.

Step 1:
8 divided by 66 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (0) from the dividend after 8, then repeat: 80 / 66

Let's proceed to step 2:
If we divide 80 by 66, we get 1 and a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 66 from 80 to get 14.
Take the next digit (4) from the dividend and append it to 14, then repeat: 144 / 66

On to step 3:
If we divide 144 by 66, we get 2 and a remainder of 12.
Use 2 as the next digit of our solution. 
Result so far: 12.0
If we subtract 132 from 144, we get 12.
Append the next digit (7) from the dividend to 12 and continue with: 127 / 66

Let's proceed to step 4:
66 goes into 127 1 times with a remainder of 61.
Put 1 as the next digit of the answer. 
Result so far: 121.0
The remainder is 61 after subtracting 66 from 127.
Append the next digit (4) from the dividend to 61 and continue with: 614 / 66

On to step 5:
66 goes into 614 9 times with a remainder of 20.
The number 9 becomes the next digit in our result. 
Result so far: 1219.0
Subtracting 594 from 614 leaves us with 20.
Fetch the next digit (9) from the dividend, attach it to 20 and continue: 209 / 66

Advancing to step 6:
66 can be fit into 209 3 times, resulting in a remainder of 11.
The next digit of our result is 3. 
Result so far: 12193.0
If we subtract 198 from 209, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 7:
The number 66 fits into 110 1 times, leaving a remainder of 44.
Use 1 as the next digit of our solution. 
Result so far: 12193.1
The remainder is 44 after subtracting 66 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 8:
66 goes into 440 6 times with a remainder of 44.
Record the quotient 6 as the next digit in the result. 
Result so far: 12193.16
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 9:
440 divided by 66 is 6 with a remainder of 44.
The next digit of our result is 6. 
Result so far: 12193.166
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.

The quotient of the division is 12193.166, and the remainder is 0.0044.