We're dividing 865665 by 57 
The aim is to understand the frequency of 57 in 865665.

Step 1:
57 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 57

Going ahead to step 2:
If we divide 86 by 57, we get 1 and a remainder of 29.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 57 from 86, we get 29.
Take the next digit (5) from the dividend and append it to 29, then repeat: 295 / 57

Going ahead to step 3:
When dividing 295 by 57, we get 5 with a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
If we take 285 away from 295, we end up with 10.
Bring next digit (6) of the dividend behind the 10 and repeat the process: 106 / 57

Moving on to step 4:
57 can be fit into 106 1 times, resulting in a remainder of 49.
Use 1 as the next digit of our solution. 
Result so far: 151.0
The remainder is 49 after subtracting 57 from 106.
Include the next digit (6) from the dividend after 49, then repeat: 496 / 57

On to step 5:
57 can be fit into 496 8 times, resulting in a remainder of 40.
Use 8 as the next digit of our solution. 
Result so far: 1518.0
The remainder is 40 after subtracting 456 from 496.
Grab the next digit (5) from the dividend, add it to 40, then carry on: 405 / 57

Let's proceed to step 6:
The number 57 fits into 405 7 times, leaving a remainder of 6.
Record the quotient 7 as the next digit in the result. 
Result so far: 15187.0
Subtracting 399 from 405 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 7:
60 divided by 57 is 1 with a remainder of 3.
The next digit of our result is 1. 
Result so far: 15187.1
The remainder is 3 after subtracting 57 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 8:
30 divided by 57 is 0 with a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 15187.1
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 9:
When dividing 300 by 57, we get 5 with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 15187.105
The remainder is 15 after subtracting 285 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 10:
If we divide 150 by 57, we get 2 and a remainder of 36.
Record the quotient 2 as the next digit in the result. 
Result so far: 15187.1052
Deduct 114 from 150 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 11:
57 can be fit into 360 6 times, resulting in a remainder of 18.
The next digit of our result is 6. 
Result so far: 15187.10526
Subtract 342 from 360 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 12:
When dividing 180 by 57, we get 3 with a remainder of 9.
Record the quotient 3 as the next digit in the result. 
Result so far: 15187.105263
Subtracting 171 from 180 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 13:
The number 57 fits into 90 1 times, leaving a remainder of 33.
Record the quotient 1 as the next digit in the result. 
Result so far: 15187.1052631
If we take 57 away from 90, we end up with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Let's proceed to step 14:
57 can be fit into 330 5 times, resulting in a remainder of 45.
Record the quotient 5 as the next digit in the result. 
Result so far: 15187.10526315
Deduct 285 from 330 and we're left 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.

The quotient of the division is 15187.10526315, and the remainder is 4.5e-08.