We're dividing 515869 by 57 
The aim is to understand the frequency of 57 in 515869.

Step 1:
The number 57 fits into 5 0 times, leaving a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 57

Moving on to step 2:
The number 57 fits into 51 0 times, leaving a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 51 to get 51.
Include the next digit (5) from the dividend after 51, then repeat: 515 / 57

Moving on to step 3:
The number 57 fits into 515 9 times, leaving a remainder of 2.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Deduct 513 from 515 and we're left with 2.
Include the next digit (8) from the dividend after 2, then repeat: 28 / 57

On to step 4:
If we divide 28 by 57, we get 0 and a remainder of 28.
Record the quotient 0 as the next digit in the result. 
Result so far: 90.0
Subtract 0 from 28 to get 28.
Bring next digit (6) of the dividend behind the 28 and repeat the process: 286 / 57

Going ahead to step 5:
57 goes into 286 5 times with a remainder of 1.
The next digit of our result is 5. 
Result so far: 905.0
Subtracting 285 from 286 leaves us with 1.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 57

Step 6:
57 goes into 19 0 times with a remainder of 19.
Record the quotient 0 as the next digit in the result. 
Result so far: 9050.0
Deduct 0 from 19 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 7:
190 divided by 57 is 3 with a remainder of 19.
Use 3 as the next digit of our solution. 
Result so far: 9050.3
If we subtract 171 from 190, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 8:
190 divided by 57 is 3 with a remainder of 19.
The next digit of our result is 3. 
Result so far: 9050.33
Deduct 171 from 190 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Our division results in 9050.33 with a remaining 0.019.