853140 divided by 66 
The aim is to understand the frequency of 66 in 853140.

On to step 1:
8 divided by 66 is 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Bring next digit (5) of the dividend behind the 8 and repeat the process: 85 / 66

Advancing to step 2:
66 can be fit into 85 1 times, resulting in a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 66 away from 85, we end up with 19.
Include the next digit (3) from the dividend after 19, then repeat: 193 / 66

Going ahead to step 3:
66 goes into 193 2 times with a remainder of 61.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Subtract 132 from 193 to get 61.
Fetch the next digit (1) from the dividend, attach it to 61 and continue: 611 / 66

Going ahead to step 4:
When dividing 611 by 66, we get 9 with a remainder of 17.
Record the quotient 9 as the next digit in the result. 
Result so far: 129.0
The remainder is 17 after subtracting 594 from 611.
Include the next digit (4) from the dividend after 17, then repeat: 174 / 66

Advancing to step 5:
If we divide 174 by 66, we get 2 and a remainder of 42.
The number 2 becomes the next digit in our result. 
Result so far: 1292.0
Subtracting 132 from 174 leaves us with 42.
Append the next digit (0) from the dividend to 42 and continue with: 420 / 66

Advancing to step 6:
The number 66 fits into 420 6 times, leaving a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 12926.0
The remainder is 24 after subtracting 396 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 7:
66 goes into 240 3 times with a remainder of 42.
Use 3 as the next digit of our solution. 
Result so far: 12926.3
Subtracting 198 from 240 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Step 8:
420 divided by 66 is 6 with a remainder of 24.
Put 6 as the next digit of the answer. 
Result so far: 12926.36
The remainder is 24 after subtracting 396 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 9:
When dividing 240 by 66, we get 3 with a remainder of 42.
Write down 3 as next digit of the result. 
Result so far: 12926.363
The remainder is 42 after subtracting 198 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 10:
420 divided by 66 is 6 with a remainder of 24.
Put 6 as the next digit of the answer. 
Result so far: 12926.3636
Deduct 396 from 420 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 11:
66 goes into 240 3 times with a remainder of 42.
Record the quotient 3 as the next digit in the result. 
Result so far: 12926.36363
Deduct 198 from 240 and we're left with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Let's proceed to step 12:
66 goes into 420 6 times with a remainder of 24.
Record the quotient 6 as the next digit in the result. 
Result so far: 12926.363636
If we take 396 away from 420, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 13:
The number 66 fits into 240 3 times, leaving a remainder of 42.
Use 3 as the next digit of our solution. 
Result so far: 12926.3636363
Subtract 198 from 240 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 14:
420 divided by 66 is 6 with a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 12926.36363636
Deduct 396 from 420 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

In conclusion, the division gives 12926.36363636 with a balance of 2.4e-08.