We're dividing 853533 by 66 
The aim is to understand the frequency of 66 in 853533.

On to step 1:
If we divide 8 by 66, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 66

Let's proceed to step 2:
85 divided by 66 is 1 with a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 66 from 85 to get 19.
Fetch the next digit (3) from the dividend, attach it to 19 and continue: 193 / 66

Step 3:
193 divided by 66 is 2 with a remainder of 61.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
Deduct 132 from 193 and we're left with 61.
Take the next digit (5) from the dividend and append it to 61, then repeat: 615 / 66

Going ahead to step 4:
615 divided by 66 is 9 with a remainder of 21.
Use 9 as the next digit of our solution. 
Result so far: 129.0
If we take 594 away from 615, we end up with 21.
Append the next digit (3) from the dividend to 21 and continue with: 213 / 66

Going ahead to step 5:
If we divide 213 by 66, we get 3 and a remainder of 15.
Write down 3 as next digit of the result. 
Result so far: 1293.0
Subtract 198 from 213 to get 15.
Bring next digit (3) of the dividend behind the 15 and repeat the process: 153 / 66

Advancing to step 6:
If we divide 153 by 66, we get 2 and a remainder of 21.
The next digit of our result is 2. 
Result so far: 12932.0
If we take 132 away from 153, we end up with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 7:
66 can be fit into 210 3 times, resulting in a remainder of 12.
The next digit of our result is 3. 
Result so far: 12932.3
Deduct 198 from 210 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 8:
66 can be fit into 120 1 times, resulting in a remainder of 54.
The next digit of our result is 1. 
Result so far: 12932.31
Deduct 66 from 120 and we're left with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Step 9:
If we divide 540 by 66, we get 8 and a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 12932.318
If we subtract 528 from 540, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 10:
When dividing 120 by 66, we get 1 with a remainder of 54.
The next digit of our result is 1. 
Result so far: 12932.3181
If we subtract 66 from 120, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Advancing to step 11:
66 can be fit into 540 8 times, resulting in a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 12932.31818
If we subtract 528 from 540, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 12:
When dividing 120 by 66, we get 1 with a remainder of 54.
Use 1 as the next digit of our solution. 
Result so far: 12932.318181
The remainder is 54 after subtracting 66 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Moving on to step 13:
The number 66 fits into 540 8 times, leaving a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 12932.3181818
Deduct 528 from 540 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 14:
The number 66 fits into 120 1 times, leaving a remainder of 54.
The next digit of our result is 1. 
Result so far: 12932.31818181
If we take 66 away from 120, we end up with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Our division results in 12932.31818181 with a remaining 5.4e-08.