We look at the division of 1255043 by 239 
The aim is to understand the frequency of 239 in 1255043.

Let's proceed to step 1:
When dividing 1 by 239, we get 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 239

Step 2:
When dividing 12 by 239, we get 0 with a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Fetch the next digit (5) from the dividend, attach it to 12 and continue: 125 / 239

Advancing to step 3:
The number 239 fits into 125 0 times, leaving a remainder of 125.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 125 leaves us with 125.
Append the next digit (5) from the dividend to 125 and continue with: 1255 / 239

On to step 4:
The number 239 fits into 1255 5 times, leaving a remainder of 60.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Subtracting 1195 from 1255 leaves us with 60.
Fetch the next digit (0) from the dividend, attach it to 60 and continue: 600 / 239

Moving on to step 5:
239 goes into 600 2 times with a remainder of 122.
The number 2 becomes the next digit in our result. 
Result so far: 52.0
If we take 478 away from 600, we end up with 122.
Fetch the next digit (4) from the dividend, attach it to 122 and continue: 1224 / 239

Going ahead to step 6:
If we divide 1224 by 239, we get 5 and a remainder of 29.
Write down 5 as next digit of the result. 
Result so far: 525.0
If we subtract 1195 from 1224, we get 29.
Take the next digit (3) from the dividend and append it to 29, then repeat: 293 / 239

Step 7:
If we divide 293 by 239, we get 1 and a remainder of 54.
Write down 1 as next digit of the result. 
Result so far: 5251.0
Deduct 239 from 293 and we're left with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Going ahead to step 8:
239 can be fit into 540 2 times, resulting in a remainder of 62.
Record the quotient 2 as the next digit in the result. 
Result so far: 5251.2
Subtracting 478 from 540 leaves us 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.

Advancing to step 9:
620 divided by 239 is 2 with a remainder of 142.
Write down 2 as next digit of the result. 
Result so far: 5251.22
Subtract 478 from 620 to get 142.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1420, and continue the process.

After the division, we end up with 5251.22 and a remainder of 0.142.