245539 ÷ 42 
The aim is to understand the frequency of 42 in 245539.

On to step 1:
42 goes into 2 0 times with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Grab the next digit (4) from the dividend, add it to 2, then carry on: 24 / 42

Going ahead to step 2:
24 divided by 42 is 0 with a remainder of 24.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 24 after subtracting 0 from 24.
Include the next digit (5) from the dividend after 24, then repeat: 245 / 42

Going ahead to step 3:
245 divided by 42 is 5 with a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
The remainder is 35 after subtracting 210 from 245.
Append the next digit (5) from the dividend to 35 and continue with: 355 / 42

Let's proceed to step 4:
The number 42 fits into 355 8 times, leaving a remainder of 19.
The number 8 becomes the next digit in our result. 
Result so far: 58.0
If we take 336 away from 355, we end up with 19.
Fetch the next digit (3) from the dividend, attach it to 19 and continue: 193 / 42

Advancing to step 5:
42 can be fit into 193 4 times, resulting in a remainder of 25.
Record the quotient 4 as the next digit in the result. 
Result so far: 584.0
Subtracting 168 from 193 leaves us with 25.
Include the next digit (9) from the dividend after 25, then repeat: 259 / 42

Going ahead to step 6:
The number 42 fits into 259 6 times, leaving a remainder of 7.
Use 6 as the next digit of our solution. 
Result so far: 5846.0
If we subtract 252 from 259, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 7:
When dividing 70 by 42, we get 1 with a remainder of 28.
The number 1 becomes the next digit in our result. 
Result so far: 5846.1
If we take 42 away from 70, we end up with 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 8:
The number 42 fits into 280 6 times, leaving a remainder of 28.
Write down 6 as next digit of the result. 
Result so far: 5846.16
If we subtract 252 from 280, 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.

Moving on to step 9:
42 can be fit into 280 6 times, resulting in a remainder of 28.
Put 6 as the next digit of the answer. 
Result so far: 5846.166
If we take 252 away from 280, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

The final result is 5846.166 with a remainder of 0.0028.