443499 divided by 66 
The aim is to understand the frequency of 66 in 443499.

On to step 1:
66 goes into 4 0 times with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Bring next digit (4) of the dividend behind the 4 and repeat the process: 44 / 66

Step 2:
The number 66 fits into 44 0 times, leaving a remainder of 44.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 44, we get 44.
Fetch the next digit (3) from the dividend, attach it to 44 and continue: 443 / 66

Going ahead to step 3:
443 divided by 66 is 6 with a remainder of 47.
The next digit of our result is 6. 
Result so far: 6.0
If we subtract 396 from 443, we get 47.
Fetch the next digit (4) from the dividend, attach it to 47 and continue: 474 / 66

Advancing to step 4:
The number 66 fits into 474 7 times, leaving a remainder of 12.
Use 7 as the next digit of our solution. 
Result so far: 67.0
Deduct 462 from 474 and we're left with 12.
Bring next digit (9) of the dividend behind the 12 and repeat the process: 129 / 66

On to step 5:
When dividing 129 by 66, we get 1 with a remainder of 63.
The number 1 becomes the next digit in our result. 
Result so far: 671.0
Subtract 66 from 129 to get 63.
Bring next digit (9) of the dividend behind the 63 and repeat the process: 639 / 66

Step 6:
When dividing 639 by 66, we get 9 with a remainder of 45.
The number 9 becomes the next digit in our result. 
Result so far: 6719.0
If we subtract 594 from 639, we get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Advancing to step 7:
66 can be fit into 450 6 times, resulting in a remainder of 54.
The number 6 becomes the next digit in our result. 
Result so far: 6719.6
The remainder is 54 after subtracting 396 from 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Step 8:
The number 66 fits into 540 8 times, leaving a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 6719.68
Subtracting 528 from 540 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 9:
If we divide 120 by 66, we get 1 and a remainder of 54.
Put 1 as the next digit of the answer. 
Result so far: 6719.681
If we subtract 66 from 120, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Advancing to step 10:
540 divided by 66 is 8 with a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 6719.6818
Subtract 528 from 540 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 11:
66 can be fit into 120 1 times, resulting in a remainder of 54.
Use 1 as the next digit of our solution. 
Result so far: 6719.68181
Subtract 66 from 120 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Going ahead to step 12:
The number 66 fits into 540 8 times, leaving a remainder of 12.
The next digit of our result is 8. 
Result so far: 6719.681818
Subtract 528 from 540 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 13:
The number 66 fits into 120 1 times, leaving a remainder of 54.
The next digit of our result is 1. 
Result so far: 6719.6818181
Deduct 66 from 120 and we're left with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Let's proceed to step 14:
66 can be fit into 540 8 times, resulting in a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 6719.68181818
Subtract 528 from 540 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final result is 6719.68181818 with a remainder of 1.2e-08.