We're dividing 872309 by 57 
The aim is to understand the frequency of 57 in 872309.

Let's proceed to step 1:
The number 57 fits into 8 0 times, leaving a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 57

Let's proceed to step 2:
57 goes into 87 1 times with a remainder of 30.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 57 from 87 to get 30.
Include the next digit (2) from the dividend after 30, then repeat: 302 / 57

On to step 3:
The number 57 fits into 302 5 times, leaving a remainder of 17.
The next digit of our result is 5. 
Result so far: 15.0
The remainder is 17 after subtracting 285 from 302.
Take the next digit (3) from the dividend and append it to 17, then repeat: 173 / 57

Going ahead to step 4:
57 goes into 173 3 times with a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 153.0
Subtract 171 from 173 to get 2.
Take the next digit (0) from the dividend and append it to 2, then repeat: 20 / 57

Step 5:
When dividing 20 by 57, we get 0 with a remainder of 20.
The next digit of our result is 0. 
Result so far: 1530.0
Subtracting 0 from 20 leaves us with 20.
Fetch the next digit (9) from the dividend, attach it to 20 and continue: 209 / 57

Let's proceed to step 6:
57 can be fit into 209 3 times, resulting in a remainder of 38.
Use 3 as the next digit of our solution. 
Result so far: 15303.0
If we take 171 away from 209, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 7:
When dividing 380 by 57, we get 6 with a remainder of 38.
Write down 6 as next digit of the result. 
Result so far: 15303.6
Subtract 342 from 380 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Going ahead to step 8:
57 goes into 380 6 times with a remainder of 38.
The number 6 becomes the next digit in our result. 
Result so far: 15303.66
If we subtract 342 from 380, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

The final outcome is 15303.66, with a leftover of 0.038.