256558 divided by 66 
The aim is to understand the frequency of 66 in 256558.

Moving on to step 1:
If we divide 2 by 66, we get 0 and a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Grab the next digit (5) from the dividend, add it to 2, then carry on: 25 / 66

Going ahead to step 2:
66 can be fit into 25 0 times, resulting in a remainder of 25.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 25, we get 25.
Append the next digit (6) from the dividend to 25 and continue with: 256 / 66

Let's proceed to step 3:
If we divide 256 by 66, we get 3 and a remainder of 58.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Deduct 198 from 256 and we're left with 58.
Bring next digit (5) of the dividend behind the 58 and repeat the process: 585 / 66

On to step 4:
66 goes into 585 8 times with a remainder of 57.
Put 8 as the next digit of the answer. 
Result so far: 38.0
If we subtract 528 from 585, we get 57.
Bring next digit (5) of the dividend behind the 57 and repeat the process: 575 / 66

Going ahead to step 5:
66 can be fit into 575 8 times, resulting in a remainder of 47.
Put 8 as the next digit of the answer. 
Result so far: 388.0
If we subtract 528 from 575, we get 47.
Take the next digit (8) from the dividend and append it to 47, then repeat: 478 / 66

Step 6:
478 divided by 66 is 7 with a remainder of 16.
The next digit of our result is 7. 
Result so far: 3887.0
Subtracting 462 from 478 leaves us 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.

On to step 7:
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: 3887.2
Subtract 132 from 160 to 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.

Step 8:
When dividing 280 by 66, we get 4 with a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 3887.24
If we take 264 away from 280, 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.

Going ahead to step 9:
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: 3887.242
Subtract 132 from 160 to 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 10:
66 goes into 280 4 times with a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 3887.2424
If we take 264 away from 280, 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.

Step 11:
When dividing 160 by 66, we get 2 with a remainder of 28.
Write down 2 as next digit of the result. 
Result so far: 3887.24242
Subtract 132 from 160 to 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.

Moving on to step 12:
66 goes into 280 4 times with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 3887.242424
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.

Moving on to step 13:
When dividing 160 by 66, we get 2 with a remainder of 28.
Write down 2 as next digit of the result. 
Result so far: 3887.2424242
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.

Advancing to step 14:
If we divide 280 by 66, we get 4 and a remainder of 16.
The next digit of our result is 4. 
Result so far: 3887.24242424
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.

Our division results in 3887.24242424 with a remaining 1.6e-08.