257286 ÷ 66 
The aim is to understand the frequency of 66 in 257286.

On to step 1:
66 goes into 2 0 times with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Grab the next digit (5) from the dividend, add it to 2, then carry on: 25 / 66

Let's proceed to step 2:
The number 66 fits into 25 0 times, leaving a remainder of 25.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 25, we end up with 25.
Bring next digit (7) of the dividend behind the 25 and repeat the process: 257 / 66

On to step 3:
If we divide 257 by 66, we get 3 and a remainder of 59.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we subtract 198 from 257, we get 59.
Fetch the next digit (2) from the dividend, attach it to 59 and continue: 592 / 66

Moving on to step 4:
66 goes into 592 8 times with a remainder of 64.
The next digit of our result is 8. 
Result so far: 38.0
If we subtract 528 from 592, we get 64.
Include the next digit (8) from the dividend after 64, then repeat: 648 / 66

Let's proceed to step 5:
The number 66 fits into 648 9 times, leaving a remainder of 54.
Write down 9 as next digit of the result. 
Result so far: 389.0
If we take 594 away from 648, we end up with 54.
Take the next digit (6) from the dividend and append it to 54, then repeat: 546 / 66

Moving on to step 6:
66 can be fit into 546 8 times, resulting in a remainder of 18.
The number 8 becomes the next digit in our result. 
Result so far: 3898.0
Subtract 528 from 546 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 7:
The number 66 fits into 180 2 times, leaving a remainder of 48.
Write down 2 as next digit of the result. 
Result so far: 3898.2
The remainder is 48 after subtracting 132 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 8:
480 divided by 66 is 7 with a remainder of 18.
Record the quotient 7 as the next digit in the result. 
Result so far: 3898.27
Subtract 462 from 480 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 9:
When dividing 180 by 66, we get 2 with a remainder of 48.
Record the quotient 2 as the next digit in the result. 
Result so far: 3898.272
Deduct 132 from 180 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 10:
66 can be fit into 480 7 times, resulting in a remainder of 18.
Record the quotient 7 as the next digit in the result. 
Result so far: 3898.2727
If we take 462 away from 480, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 11:
When dividing 180 by 66, we get 2 with a remainder of 48.
Use 2 as the next digit of our solution. 
Result so far: 3898.27272
If we subtract 132 from 180, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Step 12:
480 divided by 66 is 7 with a remainder of 18.
Use 7 as the next digit of our solution. 
Result so far: 3898.272727
Deduct 462 from 480 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 13:
If we divide 180 by 66, we get 2 and a remainder of 48.
Put 2 as the next digit of the answer. 
Result so far: 3898.2727272
If we take 132 away from 180, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 14:
When dividing 480 by 66, we get 7 with a remainder of 18.
The next digit of our result is 7. 
Result so far: 3898.27272727
If we subtract 462 from 480, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

The final result is 3898.27272727 with a remainder of 1.8e-08.