278447 ÷ 66 
The aim is to understand the frequency of 66 in 278447.

On to step 1:
66 goes into 2 0 times with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Bring next digit (7) of the dividend behind the 2 and repeat the process: 27 / 66

Advancing to step 2:
When dividing 27 by 66, we get 0 with a remainder of 27.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 27 to get 27.
Take the next digit (8) from the dividend and append it to 27, then repeat: 278 / 66

On to step 3:
When dividing 278 by 66, we get 4 with a remainder of 14.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtracting 264 from 278 leaves us with 14.
Fetch the next digit (4) from the dividend, attach it to 14 and continue: 144 / 66

Going ahead to step 4:
66 goes into 144 2 times with a remainder of 12.
The next digit of our result is 2. 
Result so far: 42.0
Deduct 132 from 144 and we're left with 12.
Take the next digit (4) from the dividend and append it to 12, then repeat: 124 / 66

On to step 5:
If we divide 124 by 66, we get 1 and a remainder of 58.
Record the quotient 1 as the next digit in the result. 
Result so far: 421.0
Subtract 66 from 124 to get 58.
Grab the next digit (7) from the dividend, add it to 58, then carry on: 587 / 66

Step 6:
If we divide 587 by 66, we get 8 and a remainder of 59.
Record the quotient 8 as the next digit in the result. 
Result so far: 4218.0
If we take 528 away from 587, we end up 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.
Put 8 as the next digit of the answer. 
Result so far: 4218.8
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.

Step 8:
If we divide 620 by 66, we get 9 and a remainder of 26.
The number 9 becomes the next digit in our result. 
Result so far: 4218.89
If we take 594 away from 620, we end up 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.

Going ahead to step 9:
The number 66 fits into 260 3 times, leaving a remainder of 62.
Write down 3 as next digit of the result. 
Result so far: 4218.893
Deduct 198 from 260 and we're left 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:
620 divided by 66 is 9 with a remainder of 26.
The number 9 becomes the next digit in our result. 
Result so far: 4218.8939
If we take 594 away from 620, we end up 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.

Going ahead to step 11:
260 divided by 66 is 3 with a remainder of 62.
Put 3 as the next digit of the answer. 
Result so far: 4218.89393
Subtract 198 from 260 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.

Moving on to step 12:
66 can be fit into 620 9 times, resulting in a remainder of 26.
Record the quotient 9 as the next digit in the result. 
Result so far: 4218.893939
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.

On to step 13:
When dividing 260 by 66, we get 3 with a remainder of 62.
The number 3 becomes the next digit in our result. 
Result so far: 4218.8939393
Deduct 198 from 260 and we're left 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.

Moving on to step 14:
66 can be fit into 620 9 times, resulting in a remainder of 26.
The next digit of our result is 9. 
Result so far: 4218.89393939
If we take 594 away from 620, we end up 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.

After the division, we end up with 4218.89393939 and a remainder of 2.6e-08.