We're dividing 278251 by 66 
The aim is to understand the frequency of 66 in 278251.

Moving on 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
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (7) from the dividend, attach it to 2 and continue: 27 / 66

Let's proceed to step 2:
If we divide 27 by 66, we get 0 and a remainder of 27.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 27, we end up with 27.
Bring next digit (8) of the dividend behind the 27 and repeat the process: 278 / 66

Going ahead to step 3:
66 can be fit into 278 4 times, resulting in a remainder of 14.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtract 264 from 278 to get 14.
Grab the next digit (2) from the dividend, add it to 14, then carry on: 142 / 66

Step 4:
The number 66 fits into 142 2 times, leaving a remainder of 10.
The next digit of our result is 2. 
Result so far: 42.0
Subtract 132 from 142 to get 10.
Append the next digit (5) from the dividend to 10 and continue with: 105 / 66

Going ahead to step 5:
105 divided by 66 is 1 with a remainder of 39.
Use 1 as the next digit of our solution. 
Result so far: 421.0
The remainder is 39 after subtracting 66 from 105.
Grab the next digit (1) from the dividend, add it to 39, then carry on: 391 / 66

Step 6:
If we divide 391 by 66, we get 5 and a remainder of 61.
The next digit of our result is 5. 
Result so far: 4215.0
Subtract 330 from 391 to get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Moving on to step 7:
610 divided by 66 is 9 with a remainder of 16.
The next digit of our result is 9. 
Result so far: 4215.9
If we take 594 away from 610, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 8:
160 divided by 66 is 2 with a remainder of 28.
Record the quotient 2 as the next digit in the result. 
Result so far: 4215.92
Deduct 132 from 160 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 9:
280 divided by 66 is 4 with a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 4215.924
Deduct 264 from 280 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 10:
The number 66 fits into 160 2 times, leaving a remainder of 28.
Use 2 as the next digit of our solution. 
Result so far: 4215.9242
If we take 132 away from 160, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 11:
66 goes into 280 4 times with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 4215.92424
Subtract 264 from 280 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 12:
If we divide 160 by 66, we get 2 and a remainder of 28.
Write down 2 as next digit of the result. 
Result so far: 4215.924242
If we subtract 132 from 160, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 13:
66 can be fit into 280 4 times, resulting in a remainder of 16.
The next digit of our result is 4. 
Result so far: 4215.9242424
If we subtract 264 from 280, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 14:
When dividing 160 by 66, we get 2 with a remainder of 28.
Use 2 as the next digit of our solution. 
Result so far: 4215.92424242
The remainder is 28 after subtracting 132 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

After the division, we end up with 4215.92424242 and a remainder of 2.8e-08.