863384 ÷ 66 
The aim is to understand the frequency of 66 in 863384.

Going ahead to step 1:
If we divide 8 by 66, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 66

Going ahead to step 2:
The number 66 fits into 86 1 times, leaving a remainder of 20.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 66 from 86 to get 20.
Append the next digit (3) from the dividend to 20 and continue with: 203 / 66

On to step 3:
The number 66 fits into 203 3 times, leaving a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
The remainder is 5 after subtracting 198 from 203.
Grab the next digit (3) from the dividend, add it to 5, then carry on: 53 / 66

On to step 4:
The number 66 fits into 53 0 times, leaving a remainder of 53.
The number 0 becomes the next digit in our result. 
Result so far: 130.0
Deduct 0 from 53 and we're left with 53.
Include the next digit (8) from the dividend after 53, then repeat: 538 / 66

Let's proceed to step 5:
66 can be fit into 538 8 times, resulting in a remainder of 10.
The next digit of our result is 8. 
Result so far: 1308.0
If we take 528 away from 538, we end up with 10.
Fetch the next digit (4) from the dividend, attach it to 10 and continue: 104 / 66

Going ahead to step 6:
When dividing 104 by 66, we get 1 with a remainder of 38.
Use 1 as the next digit of our solution. 
Result so far: 13081.0
The remainder is 38 after subtracting 66 from 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 7:
380 divided by 66 is 5 with a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 13081.5
Deduct 330 from 380 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 8:
The number 66 fits into 500 7 times, leaving a remainder of 38.
The number 7 becomes the next digit in our result. 
Result so far: 13081.57
The remainder is 38 after subtracting 462 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 9:
The number 66 fits into 380 5 times, leaving a remainder of 50.
The next digit of our result is 5. 
Result so far: 13081.575
If we take 330 away from 380, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 10:
66 can be fit into 500 7 times, resulting in a remainder of 38.
The number 7 becomes the next digit in our result. 
Result so far: 13081.5757
Subtracting 462 from 500 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 11:
66 goes into 380 5 times with a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 13081.57575
Subtract 330 from 380 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 12:
66 can be fit into 500 7 times, resulting in a remainder of 38.
Record the quotient 7 as the next digit in the result. 
Result so far: 13081.575757
Subtracting 462 from 500 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 13:
66 goes into 380 5 times with a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 13081.5757575
Subtracting 330 from 380 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 14:
66 goes into 500 7 times with a remainder of 38.
Write down 7 as next digit of the result. 
Result so far: 13081.57575757
Deduct 462 from 500 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

In conclusion, the division gives 13081.57575757 with a balance of 3.8e-08.