We divide 851855 by 66
The aim is to understand the frequency of 66 in 851855.

Let's proceed to step 1:
The number 66 fits into 8 0 times, leaving a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Include the next digit (5) from the dividend after 8, then repeat: 85 / 66

Advancing to step 2:
66 goes into 85 1 times with a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 66 from 85 to get 19.
Include the next digit (1) from the dividend after 19, then repeat: 191 / 66

Step 3:
If we divide 191 by 66, we get 2 and a remainder of 59.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
Deduct 132 from 191 and we're left with 59.
Take the next digit (8) from the dividend and append it to 59, then repeat: 598 / 66

Going ahead to step 4:
66 goes into 598 9 times with a remainder of 4.
The number 9 becomes the next digit in our result. 
Result so far: 129.0
Subtract 594 from 598 to get 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 66

Step 5:
If we divide 45 by 66, we get 0 and a remainder of 45.
The next digit of our result is 0. 
Result so far: 1290.0
If we take 0 away from 45, we end up with 45.
Take the next digit (5) from the dividend and append it to 45, then repeat: 455 / 66

Going ahead to step 6:
The number 66 fits into 455 6 times, leaving a remainder of 59.
Use 6 as the next digit of our solution. 
Result so far: 12906.0
Subtracting 396 from 455 leaves us with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Advancing to step 7:
66 can be fit into 590 8 times, resulting in a remainder of 62.
Write down 8 as next digit of the result. 
Result so far: 12906.8
Subtract 528 from 590 to get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Advancing to step 8:
66 goes into 620 9 times with a remainder of 26.
The number 9 becomes the next digit in our result. 
Result so far: 12906.89
If we subtract 594 from 620, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 9:
260 divided by 66 is 3 with a remainder of 62.
Record the quotient 3 as the next digit in the result. 
Result so far: 12906.893
If we take 198 away from 260, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

On to step 10:
If we divide 620 by 66, we get 9 and a remainder of 26.
The next digit of our result is 9. 
Result so far: 12906.8939
Subtract 594 from 620 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 11:
66 can be fit into 260 3 times, resulting in a remainder of 62.
Record the quotient 3 as the next digit in the result. 
Result so far: 12906.89393
The remainder is 62 after subtracting 198 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Advancing to step 12:
If we divide 620 by 66, we get 9 and a remainder of 26.
Write down 9 as next digit of the result. 
Result so far: 12906.893939
Deduct 594 from 620 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 13:
260 divided by 66 is 3 with a remainder of 62.
The next digit of our result is 3. 
Result so far: 12906.8939393
If we take 198 away from 260, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Going ahead to step 14:
620 divided by 66 is 9 with a remainder of 26.
Write down 9 as next digit of the result. 
Result so far: 12906.89393939
The remainder is 26 after subtracting 594 from 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

After the division, we end up with 12906.89393939 and a remainder of 2.6e-08.