We're dividing 639015 by 57 
The aim is to understand the frequency of 57 in 639015.

Let's proceed to step 1:
The number 57 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Fetch the next digit (3) from the dividend, attach it to 6 and continue: 63 / 57

Let's proceed to step 2:
If we divide 63 by 57, we get 1 and a remainder of 6.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 57 from 63 and we're left with 6.
Bring next digit (9) of the dividend behind the 6 and repeat the process: 69 / 57

Step 3:
57 can be fit into 69 1 times, resulting in a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
The remainder is 12 after subtracting 57 from 69.
Include the next digit (0) from the dividend after 12, then repeat: 120 / 57

Let's proceed to step 4:
57 can be fit into 120 2 times, resulting in a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 112.0
Subtracting 114 from 120 leaves us with 6.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 57

Advancing to step 5:
57 goes into 61 1 times with a remainder of 4.
Use 1 as the next digit of our solution. 
Result so far: 1121.0
If we subtract 57 from 61, we get 4.
Fetch the next digit (5) from the dividend, attach it to 4 and continue: 45 / 57

Advancing to step 6:
57 can be fit into 45 0 times, resulting in a remainder of 45.
Use 0 as the next digit of our solution. 
Result so far: 11210.0
If we take 0 away from 45, we end up with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Going ahead to step 7:
The number 57 fits into 450 7 times, leaving a remainder of 51.
Use 7 as the next digit of our solution. 
Result so far: 11210.7
The remainder is 51 after subtracting 399 from 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Going ahead to step 8:
The number 57 fits into 510 8 times, leaving a remainder of 54.
The next digit of our result is 8. 
Result so far: 11210.78
Subtract 456 from 510 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Let's proceed to step 9:
57 goes into 540 9 times with a remainder of 27.
Write down 9 as next digit of the result. 
Result so far: 11210.789
The remainder is 27 after subtracting 513 from 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Moving on to step 10:
When dividing 270 by 57, we get 4 with a remainder of 42.
Use 4 as the next digit of our solution. 
Result so far: 11210.7894
Subtracting 228 from 270 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Let's proceed to step 11:
57 goes into 420 7 times with a remainder of 21.
Write down 7 as next digit of the result. 
Result so far: 11210.78947
If we take 399 away from 420, we end up with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 12:
If we divide 210 by 57, we get 3 and a remainder of 39.
The next digit of our result is 3. 
Result so far: 11210.789473
Subtract 171 from 210 to get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Step 13:
57 can be fit into 390 6 times, resulting in a remainder of 48.
Use 6 as the next digit of our solution. 
Result so far: 11210.7894736
Subtract 342 from 390 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 14:
The number 57 fits into 480 8 times, leaving a remainder of 24.
The number 8 becomes the next digit in our result. 
Result so far: 11210.78947368
If we subtract 456 from 480, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

The final outcome is 11210.78947368, with a leftover of 2.4e-08.