We divide 856712 by 66
The aim is to understand the frequency of 66 in 856712.

On to step 1:
The number 66 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
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

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
The remainder is 19 after subtracting 66 from 85.
Bring next digit (6) of the dividend behind the 19 and repeat the process: 196 / 66

Let's proceed to step 3:
66 can be fit into 196 2 times, resulting in a remainder of 64.
Put 2 as the next digit of the answer. 
Result so far: 12.0
If we subtract 132 from 196, we get 64.
Take the next digit (7) from the dividend and append it to 64, then repeat: 647 / 66

On to step 4:
647 divided by 66 is 9 with a remainder of 53.
The number 9 becomes the next digit in our result. 
Result so far: 129.0
Subtracting 594 from 647 leaves us with 53.
Grab the next digit (1) from the dividend, add it to 53, then carry on: 531 / 66

Advancing to step 5:
531 divided by 66 is 8 with a remainder of 3.
The number 8 becomes the next digit in our result. 
Result so far: 1298.0
Deduct 528 from 531 and we're left with 3.
Take the next digit (2) from the dividend and append it to 3, then repeat: 32 / 66

Advancing to step 6:
66 goes into 32 0 times with a remainder of 32.
The number 0 becomes the next digit in our result. 
Result so far: 12980.0
If we subtract 0 from 32, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 7:
320 divided by 66 is 4 with a remainder of 56.
Use 4 as the next digit of our solution. 
Result so far: 12980.4
Subtract 264 from 320 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 8:
When dividing 560 by 66, we get 8 with a remainder of 32.
The number 8 becomes the next digit in our result. 
Result so far: 12980.48
Subtract 528 from 560 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 9:
The number 66 fits into 320 4 times, leaving a remainder of 56.
The next digit of our result is 4. 
Result so far: 12980.484
The remainder is 56 after subtracting 264 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Going ahead to step 10:
560 divided by 66 is 8 with a remainder of 32.
Record the quotient 8 as the next digit in the result. 
Result so far: 12980.4848
Subtracting 528 from 560 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 11:
66 can be fit into 320 4 times, resulting in a remainder of 56.
Write down 4 as next digit of the result. 
Result so far: 12980.48484
Subtract 264 from 320 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Advancing to step 12:
The number 66 fits into 560 8 times, leaving a remainder of 32.
Record the quotient 8 as the next digit in the result. 
Result so far: 12980.484848
Subtracting 528 from 560 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 13:
If we divide 320 by 66, we get 4 and a remainder of 56.
Write down 4 as next digit of the result. 
Result so far: 12980.4848484
The remainder is 56 after subtracting 264 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 14:
560 divided by 66 is 8 with a remainder of 32.
Put 8 as the next digit of the answer. 
Result so far: 12980.48484848
Subtract 528 from 560 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

The final result is 12980.48484848 with a remainder of 3.2e-08.