We look at the division of 854229 by 66 
The aim is to understand the frequency of 66 in 854229.

Going ahead to step 1:
The number 66 fits into 8 0 times, leaving 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.
Bring next digit (5) of the dividend behind the 8 and repeat the process: 85 / 66

Moving on to step 2:
85 divided by 66 is 1 with a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 66 from 85 to get 19.
Take the next digit (4) from the dividend and append it to 19, then repeat: 194 / 66

On to step 3:
194 divided by 66 is 2 with a remainder of 62.
Write down 2 as next digit of the result. 
Result so far: 12.0
If we subtract 132 from 194, we get 62.
Bring next digit (2) of the dividend behind the 62 and repeat the process: 622 / 66

Step 4:
When dividing 622 by 66, we get 9 with a remainder of 28.
Put 9 as the next digit of the answer. 
Result so far: 129.0
The remainder is 28 after subtracting 594 from 622.
Include the next digit (2) from the dividend after 28, then repeat: 282 / 66

Let's proceed to step 5:
66 can be fit into 282 4 times, resulting in a remainder of 18.
Write down 4 as next digit of the result. 
Result so far: 1294.0
Subtracting 264 from 282 leaves us with 18.
Bring next digit (9) of the dividend behind the 18 and repeat the process: 189 / 66

Let's proceed to step 6:
66 can be fit into 189 2 times, resulting in a remainder of 57.
Write down 2 as next digit of the result. 
Result so far: 12942.0
If we take 132 away from 189, we end up with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Moving on to step 7:
When dividing 570 by 66, we get 8 with a remainder of 42.
Use 8 as the next digit of our solution. 
Result so far: 12942.8
Subtract 528 from 570 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.

Step 8:
420 divided by 66 is 6 with a remainder of 24.
The next digit of our result is 6. 
Result so far: 12942.86
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.

Advancing to step 9:
If we divide 240 by 66, we get 3 and a remainder of 42.
The number 3 becomes the next digit in our result. 
Result so far: 12942.863
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.

On to step 10:
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: 12942.8636
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 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: 12942.86363
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.

Advancing to step 12:
When dividing 420 by 66, we get 6 with a remainder of 24.
The next digit of our result is 6. 
Result so far: 12942.863636
Subtracting 396 from 420 leaves us 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.

Moving on to step 13:
If we divide 240 by 66, we get 3 and a remainder of 42.
The next digit of our result is 3. 
Result so far: 12942.8636363
If we subtract 198 from 240, we 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:
The number 66 fits into 420 6 times, leaving a remainder of 24.
Record the quotient 6 as the next digit in the result. 
Result so far: 12942.86363636
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.

The final outcome is 12942.86363636, with a leftover of 2.4e-08.