We look at the division of 569681 by 66 
The aim is to understand the frequency of 66 in 569681.

Step 1:
The number 66 fits into 5 0 times, leaving a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Fetch the next digit (6) from the dividend, attach it to 5 and continue: 56 / 66

On to step 2:
56 divided by 66 is 0 with a remainder of 56.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 56 after subtracting 0 from 56.
Bring next digit (9) of the dividend behind the 56 and repeat the process: 569 / 66

Going ahead to step 3:
The number 66 fits into 569 8 times, leaving a remainder of 41.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
The remainder is 41 after subtracting 528 from 569.
Grab the next digit (6) from the dividend, add it to 41, then carry on: 416 / 66

Moving on to step 4:
66 goes into 416 6 times with a remainder of 20.
Record the quotient 6 as the next digit in the result. 
Result so far: 86.0
If we subtract 396 from 416, we get 20.
Fetch the next digit (8) from the dividend, attach it to 20 and continue: 208 / 66

Advancing to step 5:
208 divided by 66 is 3 with a remainder of 10.
Write down 3 as next digit of the result. 
Result so far: 863.0
If we take 198 away from 208, we end up with 10.
Bring next digit (1) of the dividend behind the 10 and repeat the process: 101 / 66

Moving on to step 6:
The number 66 fits into 101 1 times, leaving a remainder of 35.
Record the quotient 1 as the next digit in the result. 
Result so far: 8631.0
If we subtract 66 from 101, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 7:
66 can be fit into 350 5 times, resulting in a remainder of 20.
The number 5 becomes the next digit in our result. 
Result so far: 8631.5
Subtracting 330 from 350 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 8:
200 divided by 66 is 3 with a remainder of 2.
Put 3 as the next digit of the answer. 
Result so far: 8631.53
The remainder is 2 after subtracting 198 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 9:
66 goes into 20 0 times with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 8631.53
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 10:
If we divide 200 by 66, we get 3 and a remainder of 2.
The next digit of our result is 3. 
Result so far: 8631.5303
If we subtract 198 from 200, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 11:
66 can be fit into 20 0 times, resulting in a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 8631.5303
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 12:
66 can be fit into 200 3 times, resulting in a remainder of 2.
Write down 3 as next digit of the result. 
Result so far: 8631.530303
Subtract 198 from 200 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 13:
66 can be fit into 20 0 times, resulting in a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 8631.530303
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 14:
When dividing 200 by 66, we get 3 with a remainder of 2.
Put 3 as the next digit of the answer. 
Result so far: 8631.53030303
If we take 198 away from 200, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final outcome is 8631.53030303, with a leftover of 2e-09.