We look at the division of 647490 by 66 
The aim is to understand the frequency of 66 in 647490.

Going ahead to step 1:
66 can be fit into 6 0 times, resulting in a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 66

On to step 2:
When dividing 64 by 66, we get 0 with a remainder of 64.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 64 and we're left with 64.
Include the next digit (7) from the dividend after 64, then repeat: 647 / 66

Step 3:
66 goes into 647 9 times with a remainder of 53.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
If we take 594 away from 647, we end up with 53.
Bring next digit (4) of the dividend behind the 53 and repeat the process: 534 / 66

Let's proceed to step 4:
The number 66 fits into 534 8 times, leaving a remainder of 6.
Write down 8 as next digit of the result. 
Result so far: 98.0
The remainder is 6 after subtracting 528 from 534.
Include the next digit (9) from the dividend after 6, then repeat: 69 / 66

Moving on to step 5:
69 divided by 66 is 1 with a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 981.0
The remainder is 3 after subtracting 66 from 69.
Include the next digit (0) from the dividend after 3, then repeat: 30 / 66

On to step 6:
If we divide 30 by 66, we get 0 and a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 9810.0
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 7:
The number 66 fits into 300 4 times, leaving a remainder of 36.
Record the quotient 4 as the next digit in the result. 
Result so far: 9810.4
Subtract 264 from 300 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 8:
If we divide 360 by 66, we get 5 and a remainder of 30.
Record the quotient 5 as the next digit in the result. 
Result so far: 9810.45
If we take 330 away from 360, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 9:
The number 66 fits into 300 4 times, leaving a remainder of 36.
The number 4 becomes the next digit in our result. 
Result so far: 9810.454
The remainder is 36 after subtracting 264 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 10:
If we divide 360 by 66, we get 5 and a remainder of 30.
The next digit of our result is 5. 
Result so far: 9810.4545
If we subtract 330 from 360, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 11:
When dividing 300 by 66, we get 4 with a remainder of 36.
The number 4 becomes the next digit in our result. 
Result so far: 9810.45454
Deduct 264 from 300 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 12:
When dividing 360 by 66, we get 5 with a remainder of 30.
The next digit of our result is 5. 
Result so far: 9810.454545
Deduct 330 from 360 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 13:
66 can be fit into 300 4 times, resulting in a remainder of 36.
Write down 4 as next digit of the result. 
Result so far: 9810.4545454
If we subtract 264 from 300, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 14:
When dividing 360 by 66, we get 5 with a remainder of 30.
The next digit of our result is 5. 
Result so far: 9810.45454545
If we take 330 away from 360, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

After the division, we end up with 9810.45454545 and a remainder of 3e-08.