We're dividing 285310 by 66 
The aim is to understand the frequency of 66 in 285310.

Going ahead to step 1:
The number 66 fits into 2 0 times, leaving a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 66

Step 2:
66 can be fit into 28 0 times, resulting in a remainder of 28.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 28 and we're left with 28.
Grab the next digit (5) from the dividend, add it to 28, then carry on: 285 / 66

Let's proceed to step 3:
When dividing 285 by 66, we get 4 with a remainder of 21.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Deduct 264 from 285 and we're left with 21.
Grab the next digit (3) from the dividend, add it to 21, then carry on: 213 / 66

Advancing to step 4:
66 can be fit into 213 3 times, resulting in a remainder of 15.
The number 3 becomes the next digit in our result. 
Result so far: 43.0
Deduct 198 from 213 and we're left with 15.
Include the next digit (1) from the dividend after 15, then repeat: 151 / 66

Step 5:
If we divide 151 by 66, we get 2 and a remainder of 19.
Record the quotient 2 as the next digit in the result. 
Result so far: 432.0
If we subtract 132 from 151, we get 19.
Fetch the next digit (0) from the dividend, attach it to 19 and continue: 190 / 66

Moving on to step 6:
66 goes into 190 2 times with a remainder of 58.
The number 2 becomes the next digit in our result. 
Result so far: 4322.0
If we take 132 away from 190, we end up with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 7:
66 goes into 580 8 times with a remainder of 52.
Record the quotient 8 as the next digit in the result. 
Result so far: 4322.8
Deduct 528 from 580 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 8:
520 divided by 66 is 7 with a remainder of 58.
Put 7 as the next digit of the answer. 
Result so far: 4322.87
Subtract 462 from 520 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 9:
The number 66 fits into 580 8 times, leaving a remainder of 52.
The next digit of our result is 8. 
Result so far: 4322.878
If we subtract 528 from 580, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 10:
When dividing 520 by 66, we get 7 with a remainder of 58.
Record the quotient 7 as the next digit in the result. 
Result so far: 4322.8787
If we take 462 away from 520, we end up with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 11:
580 divided by 66 is 8 with a remainder of 52.
Put 8 as the next digit of the answer. 
Result so far: 4322.87878
If we subtract 528 from 580, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 12:
If we divide 520 by 66, we get 7 and a remainder of 58.
Write down 7 as next digit of the result. 
Result so far: 4322.878787
If we subtract 462 from 520, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 13:
66 goes into 580 8 times with a remainder of 52.
Write down 8 as next digit of the result. 
Result so far: 4322.8787878
If we subtract 528 from 580, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 14:
When dividing 520 by 66, we get 7 with a remainder of 58.
The next digit of our result is 7. 
Result so far: 4322.87878787
If we subtract 462 from 520, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

In conclusion, the division gives 4322.87878787 with a balance of 5.8e-08.