We're dividing 665745 by 66 
The aim is to understand the frequency of 66 in 665745.

On to step 1:
66 can be fit into 6 0 times, resulting in a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 66

Advancing to step 2:
If we divide 66 by 66, we get 1 and a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 66 away from 66, we end up with 0.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 66

Moving on to step 3:
If we divide 5 by 66, we get 0 and a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 10.0
If we take 0 away from 5, we end up with 5.
Take the next digit (7) from the dividend and append it to 5, then repeat: 57 / 66

Advancing to step 4:
57 divided by 66 is 0 with a remainder of 57.
Use 0 as the next digit of our solution. 
Result so far: 100.0
Subtracting 0 from 57 leaves us with 57.
Append the next digit (4) from the dividend to 57 and continue with: 574 / 66

Step 5:
574 divided by 66 is 8 with a remainder of 46.
Use 8 as the next digit of our solution. 
Result so far: 1008.0
If we take 528 away from 574, we end up with 46.
Grab the next digit (5) from the dividend, add it to 46, then carry on: 465 / 66

On to step 6:
When dividing 465 by 66, we get 7 with a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 10087.0
Deduct 462 from 465 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 7:
The number 66 fits into 30 0 times, leaving a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 10087.0
Subtract 0 from 30 to 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.

Let's proceed to step 8:
The number 66 fits into 300 4 times, leaving a remainder of 36.
The next digit of our result is 4. 
Result so far: 10087.04
If we take 264 away from 300, we end up 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.

Step 9:
If we divide 360 by 66, we get 5 and a remainder of 30.
Use 5 as the next digit of our solution. 
Result so far: 10087.045
The remainder is 30 after subtracting 330 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 10:
If we divide 300 by 66, we get 4 and a remainder of 36.
Write down 4 as next digit of the result. 
Result so far: 10087.0454
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.

Advancing to step 11:
The number 66 fits into 360 5 times, leaving a remainder of 30.
The number 5 becomes the next digit in our result. 
Result so far: 10087.04545
Subtract 330 from 360 to 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.

On to step 12:
300 divided by 66 is 4 with a remainder of 36.
Record the quotient 4 as the next digit in the result. 
Result so far: 10087.045454
Subtracting 264 from 300 leaves us 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.

Advancing to step 13:
66 goes into 360 5 times with a remainder of 30.
The next digit of our result is 5. 
Result so far: 10087.0454545
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.

Let's proceed to step 14:
66 goes into 300 4 times with a remainder of 36.
Put 4 as the next digit of the answer. 
Result so far: 10087.04545454
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.

The quotient of the division is 10087.04545454, and the remainder is 3.6e-08.