We look at the division of 75358 by 57 
The aim is to understand the frequency of 57 in 75358.

Advancing to step 1:
When dividing 7 by 57, we get 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Grab the next digit (5) from the dividend, add it to 7, then carry on: 75 / 57

Advancing to step 2:
If we divide 75 by 57, we get 1 and a remainder of 18.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 57 from 75 and we're left with 18.
Append the next digit (3) from the dividend to 18 and continue with: 183 / 57

Moving on to step 3:
The number 57 fits into 183 3 times, leaving a remainder of 12.
Put 3 as the next digit of the answer. 
Result so far: 13.0
Subtracting 171 from 183 leaves us with 12.
Append the next digit (5) from the dividend to 12 and continue with: 125 / 57

Step 4:
If we divide 125 by 57, we get 2 and a remainder of 11.
Write down 2 as next digit of the result. 
Result so far: 132.0
Deduct 114 from 125 and we're left with 11.
Bring next digit (8) of the dividend behind the 11 and repeat the process: 118 / 57

Going ahead to step 5:
57 goes into 118 2 times with a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 1322.0
If we take 114 away from 118, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 6:
If we divide 40 by 57, we get 0 and a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 1322.0
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 7:
57 goes into 400 7 times with a remainder of 1.
Record the quotient 7 as the next digit in the result. 
Result so far: 1322.07
The remainder is 1 after subtracting 399 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 8:
When dividing 10 by 57, we get 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 1322.07
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 9:
If we divide 100 by 57, we get 1 and a remainder of 43.
The number 1 becomes the next digit in our result. 
Result so far: 1322.0701
If we subtract 57 from 100, we get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Step 10:
430 divided by 57 is 7 with a remainder of 31.
Write down 7 as next digit of the result. 
Result so far: 1322.07017
Deduct 399 from 430 and we're left with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Let's proceed to step 11:
The number 57 fits into 310 5 times, leaving a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 1322.070175
The remainder is 25 after subtracting 285 from 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 12:
When dividing 250 by 57, we get 4 with a remainder of 22.
Put 4 as the next digit of the answer. 
Result so far: 1322.0701754
If we take 228 away from 250, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 13:
57 can be fit into 220 3 times, resulting in a remainder of 49.
Use 3 as the next digit of our solution. 
Result so far: 1322.07017543
Subtract 171 from 220 to get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

After the division, we end up with 1322.07017543 and a remainder of 4.9e-08.