We look at the division of 830309 by 57 
The aim is to understand the frequency of 57 in 830309.

On to step 1:
57 goes into 8 0 times with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Grab the next digit (3) from the dividend, add it to 8, then carry on: 83 / 57

Step 2:
When dividing 83 by 57, we get 1 with a remainder of 26.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 26 after subtracting 57 from 83.
Bring next digit (0) of the dividend behind the 26 and repeat the process: 260 / 57

Advancing to step 3:
The number 57 fits into 260 4 times, leaving a remainder of 32.
The next digit of our result is 4. 
Result so far: 14.0
If we subtract 228 from 260, we get 32.
Bring next digit (3) of the dividend behind the 32 and repeat the process: 323 / 57

Advancing to step 4:
323 divided by 57 is 5 with a remainder of 38.
Use 5 as the next digit of our solution. 
Result so far: 145.0
Deduct 285 from 323 and we're left with 38.
Fetch the next digit (0) from the dividend, attach it to 38 and continue: 380 / 57

Let's proceed to step 5:
380 divided by 57 is 6 with a remainder of 38.
Use 6 as the next digit of our solution. 
Result so far: 1456.0
Subtract 342 from 380 to get 38.
Take the next digit (9) from the dividend and append it to 38, then repeat: 389 / 57

Going ahead to step 6:
57 can be fit into 389 6 times, resulting in a remainder of 47.
Use 6 as the next digit of our solution. 
Result so far: 14566.0
If we take 342 away from 389, we end up with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Let's proceed to step 7:
57 goes into 470 8 times with a remainder of 14.
Use 8 as the next digit of our solution. 
Result so far: 14566.8
Deduct 456 from 470 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 8:
When dividing 140 by 57, we get 2 with a remainder of 26.
Record the quotient 2 as the next digit in the result. 
Result so far: 14566.82
Subtracting 114 from 140 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 9:
If we divide 260 by 57, we get 4 and a remainder of 32.
The next digit of our result is 4. 
Result so far: 14566.824
If we subtract 228 from 260, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 10:
320 divided by 57 is 5 with a remainder of 35.
The number 5 becomes the next digit in our result. 
Result so far: 14566.8245
Subtracting 285 from 320 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 11:
57 goes into 350 6 times with a remainder of 8.
Use 6 as the next digit of our solution. 
Result so far: 14566.82456
Deduct 342 from 350 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 12:
57 can be fit into 80 1 times, resulting in a remainder of 23.
Write down 1 as next digit of the result. 
Result so far: 14566.824561
Subtracting 57 from 80 leaves us with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Advancing to step 13:
57 can be fit into 230 4 times, resulting in a remainder of 2.
The next digit of our result is 4. 
Result so far: 14566.8245614
Subtract 228 from 230 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 14:
57 goes into 20 0 times with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 14566.8245614
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final outcome is 14566.8245614, with a leftover of 2e-08.