We're dividing 16661553 by 254 
The aim is to understand the frequency of 254 in 16661553.

Let's proceed to step 1:
254 can be fit into 1 0 times, resulting in a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Take the next digit (6) from the dividend and append it to 1, then repeat: 16 / 254

Let's proceed to step 2:
254 can be fit into 16 0 times, resulting in a remainder of 16.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 16 to get 16.
Grab the next digit (6) from the dividend, add it to 16, then carry on: 166 / 254

On to step 3:
254 goes into 166 0 times with a remainder of 166.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 166 and we're left with 166.
Fetch the next digit (6) from the dividend, attach it to 166 and continue: 1666 / 254

On to step 4:
When dividing 1666 by 254, we get 6 with a remainder of 142.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Subtract 1524 from 1666 to get 142.
Fetch the next digit (1) from the dividend, attach it to 142 and continue: 1421 / 254

Let's proceed to step 5:
If we divide 1421 by 254, we get 5 and a remainder of 151.
The next digit of our result is 5. 
Result so far: 65.0
Subtract 1270 from 1421 to get 151.
Bring next digit (5) of the dividend behind the 151 and repeat the process: 1515 / 254

Step 6:
The number 254 fits into 1515 5 times, leaving a remainder of 245.
Put 5 as the next digit of the answer. 
Result so far: 655.0
Subtract 1270 from 1515 to get 245.
Include the next digit (5) from the dividend after 245, then repeat: 2455 / 254

Going ahead to step 7:
When dividing 2455 by 254, we get 9 with a remainder of 169.
Use 9 as the next digit of our solution. 
Result so far: 6559.0
The remainder is 169 after subtracting 2286 from 2455.
Include the next digit (3) from the dividend after 169, then repeat: 1693 / 254

Let's proceed to step 8:
1693 divided by 254 is 6 with a remainder of 169.
The number 6 becomes the next digit in our result. 
Result so far: 65596.0
The remainder is 169 after subtracting 1524 from 1693.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1690, and continue the process.

Step 9:
254 goes into 1690 6 times with a remainder of 166.
Use 6 as the next digit of our solution. 
Result so far: 65596.6
Subtract 1524 from 1690 to get 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

On to step 10:
254 goes into 1660 6 times with a remainder of 136.
Use 6 as the next digit of our solution. 
Result so far: 65596.66
Subtracting 1524 from 1660 leaves us with 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

After the division, we end up with 65596.66 and a remainder of 0.136.