We're dividing 797577 by 66 
The aim is to understand the frequency of 66 in 797577.

Going ahead to step 1:
7 divided by 66 is 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Grab the next digit (9) from the dividend, add it to 7, then carry on: 79 / 66

Moving on to step 2:
66 can be fit into 79 1 times, resulting in a remainder of 13.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 66 from 79 to get 13.
Bring next digit (7) of the dividend behind the 13 and repeat the process: 137 / 66

Advancing to step 3:
137 divided by 66 is 2 with a remainder of 5.
The next digit of our result is 2. 
Result so far: 12.0
Subtract 132 from 137 to get 5.
Append the next digit (5) from the dividend to 5 and continue with: 55 / 66

Step 4:
66 goes into 55 0 times with a remainder of 55.
Write down 0 as next digit of the result. 
Result so far: 120.0
Subtracting 0 from 55 leaves us with 55.
Append the next digit (7) from the dividend to 55 and continue with: 557 / 66

Going ahead to step 5:
66 can be fit into 557 8 times, resulting in a remainder of 29.
Write down 8 as next digit of the result. 
Result so far: 1208.0
Deduct 528 from 557 and we're left with 29.
Fetch the next digit (7) from the dividend, attach it to 29 and continue: 297 / 66

Advancing to step 6:
When dividing 297 by 66, we get 4 with a remainder of 33.
Put 4 as the next digit of the answer. 
Result so far: 12084.0
Subtracting 264 from 297 leaves us with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Let's proceed to step 7:
330 divided by 66 is 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 12084.5
Subtracting 330 from 330 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
0 divided by 66 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 12084.5
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 9:
66 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 12084.5
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 12084.5 with a remaining 0.0.