We're dividing 42571900 by 549 
The aim is to understand the frequency of 549 in 42571900.

Moving on to step 1:
4 divided by 549 is 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 549

Let's proceed to step 2:
If we divide 42 by 549, we get 0 and a remainder of 42.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 42 leaves us with 42.
Include the next digit (5) from the dividend after 42, then repeat: 425 / 549

Step 3:
The number 549 fits into 425 0 times, leaving a remainder of 425.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 425, we end up with 425.
Append the next digit (7) from the dividend to 425 and continue with: 4257 / 549

Moving on to step 4:
When dividing 4257 by 549, we get 7 with a remainder of 414.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Deduct 3843 from 4257 and we're left with 414.
Bring next digit (1) of the dividend behind the 414 and repeat the process: 4141 / 549

On to step 5:
If we divide 4141 by 549, we get 7 and a remainder of 298.
Record the quotient 7 as the next digit in the result. 
Result so far: 77.0
The remainder is 298 after subtracting 3843 from 4141.
Append the next digit (9) from the dividend to 298 and continue with: 2989 / 549

Moving on to step 6:
2989 divided by 549 is 5 with a remainder of 244.
The next digit of our result is 5. 
Result so far: 775.0
Deduct 2745 from 2989 and we're left with 244.
Bring next digit (0) of the dividend behind the 244 and repeat the process: 2440 / 549

Let's proceed to step 7:
The number 549 fits into 2440 4 times, leaving a remainder of 244.
Write down 4 as next digit of the result. 
Result so far: 7754.0
Deduct 2196 from 2440 and we're left with 244.
Fetch the next digit (0) from the dividend, attach it to 244 and continue: 2440 / 549

Going ahead to step 8:
2440 divided by 549 is 4 with a remainder of 244.
Use 4 as the next digit of our solution. 
Result so far: 77544.0
If we subtract 2196 from 2440, we get 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Moving on to step 9:
549 goes into 2440 4 times with a remainder of 244.
Put 4 as the next digit of the answer. 
Result so far: 77544.4
The remainder is 244 after subtracting 2196 from 2440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Moving on to step 10:
549 can be fit into 2440 4 times, resulting in a remainder of 244.
Use 4 as the next digit of our solution. 
Result so far: 77544.44
The remainder is 244 after subtracting 2196 from 2440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

The final outcome is 77544.44, with a leftover of 0.244.