We look at the division of 661036 by 57 
The aim is to understand the frequency of 57 in 661036.

Going ahead 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
If we subtract 0 from 6, we get 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 57

On to step 2:
When dividing 66 by 57, we get 1 with a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 9 after subtracting 57 from 66.
Append the next digit (1) from the dividend to 9 and continue with: 91 / 57

Advancing to step 3:
57 can be fit into 91 1 times, resulting in a remainder of 34.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
Deduct 57 from 91 and we're left with 34.
Bring next digit (0) of the dividend behind the 34 and repeat the process: 340 / 57

Going ahead to step 4:
57 goes into 340 5 times with a remainder of 55.
Write down 5 as next digit of the result. 
Result so far: 115.0
If we take 285 away from 340, we end up with 55.
Include the next digit (3) from the dividend after 55, then repeat: 553 / 57

On to step 5:
553 divided by 57 is 9 with a remainder of 40.
Use 9 as the next digit of our solution. 
Result so far: 1159.0
Subtract 513 from 553 to get 40.
Bring next digit (6) of the dividend behind the 40 and repeat the process: 406 / 57

Going ahead to step 6:
When dividing 406 by 57, we get 7 with a remainder of 7.
Write down 7 as next digit of the result. 
Result so far: 11597.0
The remainder is 7 after subtracting 399 from 406.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 7:
70 divided by 57 is 1 with a remainder of 13.
The next digit of our result is 1. 
Result so far: 11597.1
If we subtract 57 from 70, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 8:
When dividing 130 by 57, we get 2 with a remainder of 16.
Put 2 as the next digit of the answer. 
Result so far: 11597.12
If we subtract 114 from 130, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 9:
The number 57 fits into 160 2 times, leaving a remainder of 46.
The number 2 becomes the next digit in our result. 
Result so far: 11597.122
If we subtract 114 from 160, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Our division results in 11597.122 with a remaining 0.0046.