We look at the division of 449786 by 66 
The aim is to understand the frequency of 66 in 449786.

Step 1:
66 goes into 4 0 times with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Bring next digit (4) of the dividend behind the 4 and repeat the process: 44 / 66

Advancing to step 2:
If we divide 44 by 66, we get 0 and a remainder of 44.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 44 to get 44.
Grab the next digit (9) from the dividend, add it to 44, then carry on: 449 / 66

Going ahead to step 3:
The number 66 fits into 449 6 times, leaving a remainder of 53.
The next digit of our result is 6. 
Result so far: 6.0
Subtract 396 from 449 to get 53.
Take the next digit (7) from the dividend and append it to 53, then repeat: 537 / 66

Step 4:
If we divide 537 by 66, we get 8 and a remainder of 9.
The number 8 becomes the next digit in our result. 
Result so far: 68.0
If we subtract 528 from 537, we get 9.
Take the next digit (8) from the dividend and append it to 9, then repeat: 98 / 66

Advancing to step 5:
The number 66 fits into 98 1 times, leaving a remainder of 32.
Use 1 as the next digit of our solution. 
Result so far: 681.0
Deduct 66 from 98 and we're left with 32.
Fetch the next digit (6) from the dividend, attach it to 32 and continue: 326 / 66

Moving on to step 6:
When dividing 326 by 66, we get 4 with a remainder of 62.
Put 4 as the next digit of the answer. 
Result so far: 6814.0
Deduct 264 from 326 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

On to step 7:
When dividing 620 by 66, we get 9 with a remainder of 26.
Write down 9 as next digit of the result. 
Result so far: 6814.9
If we subtract 594 from 620, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 8:
66 can be fit into 260 3 times, resulting in a remainder of 62.
Put 3 as the next digit of the answer. 
Result so far: 6814.93
Subtract 198 from 260 to get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

On to step 9:
When dividing 620 by 66, we get 9 with a remainder of 26.
Put 9 as the next digit of the answer. 
Result so far: 6814.939
Subtract 594 from 620 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 10:
When dividing 260 by 66, we get 3 with a remainder of 62.
Put 3 as the next digit of the answer. 
Result so far: 6814.9393
Subtracting 198 from 260 leaves us with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Moving on to step 11:
When dividing 620 by 66, we get 9 with a remainder of 26.
Write down 9 as next digit of the result. 
Result so far: 6814.93939
Subtract 594 from 620 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 12:
66 goes into 260 3 times with a remainder of 62.
The number 3 becomes the next digit in our result. 
Result so far: 6814.939393
The remainder is 62 after subtracting 198 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Let's proceed to step 13:
66 goes into 620 9 times with a remainder of 26.
Write down 9 as next digit of the result. 
Result so far: 6814.9393939
If we take 594 away from 620, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 14:
260 divided by 66 is 3 with a remainder of 62.
The number 3 becomes the next digit in our result. 
Result so far: 6814.93939393
Deduct 198 from 260 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

After the division, we end up with 6814.93939393 and a remainder of 6.2e-08.