We look at the division of 943992 by 57 
The aim is to understand the frequency of 57 in 943992.

Advancing to step 1:
57 goes into 9 0 times with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Bring next digit (4) of the dividend behind the 9 and repeat the process: 94 / 57

Going ahead to step 2:
When dividing 94 by 57, we get 1 with a remainder of 37.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 57 from 94 leaves us with 37.
Bring next digit (3) of the dividend behind the 37 and repeat the process: 373 / 57

Let's proceed to step 3:
373 divided by 57 is 6 with a remainder of 31.
Write down 6 as next digit of the result. 
Result so far: 16.0
If we take 342 away from 373, we end up with 31.
Grab the next digit (9) from the dividend, add it to 31, then carry on: 319 / 57

Advancing to step 4:
319 divided by 57 is 5 with a remainder of 34.
The number 5 becomes the next digit in our result. 
Result so far: 165.0
Deduct 285 from 319 and we're left with 34.
Include the next digit (9) from the dividend after 34, then repeat: 349 / 57

Moving on to step 5:
When dividing 349 by 57, we get 6 with a remainder of 7.
The next digit of our result is 6. 
Result so far: 1656.0
The remainder is 7 after subtracting 342 from 349.
Grab the next digit (2) from the dividend, add it to 7, then carry on: 72 / 57

Moving on to step 6:
If we divide 72 by 57, we get 1 and a remainder of 15.
Put 1 as the next digit of the answer. 
Result so far: 16561.0
The remainder is 15 after subtracting 57 from 72.
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 7:
150 divided by 57 is 2 with a remainder of 36.
The next digit of our result is 2. 
Result so far: 16561.2
The remainder is 36 after subtracting 114 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 8:
If we divide 360 by 57, we get 6 and a remainder of 18.
Put 6 as the next digit of the answer. 
Result so far: 16561.26
Subtracting 342 from 360 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 9:
57 can be fit into 180 3 times, resulting in a remainder of 9.
Write down 3 as next digit of the result. 
Result so far: 16561.263
If we subtract 171 from 180, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 10:
90 divided by 57 is 1 with a remainder of 33.
Use 1 as the next digit of our solution. 
Result so far: 16561.2631
Subtract 57 from 90 to get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Going ahead to step 11:
When dividing 330 by 57, we get 5 with a remainder of 45.
Use 5 as the next digit of our solution. 
Result so far: 16561.26315
Subtract 285 from 330 to get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Moving on to step 12:
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: 16561.263157
If we subtract 399 from 450, we get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Moving on to step 13:
If we divide 510 by 57, we get 8 and a remainder of 54.
The next digit of our result is 8. 
Result so far: 16561.2631578
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 14:
If we divide 540 by 57, we get 9 and a remainder of 27.
The number 9 becomes the next digit in our result. 
Result so far: 16561.26315789
Subtract 513 from 540 to get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

The final result is 16561.26315789 with a remainder of 2.7e-08.