We look at the division of 311845 by 75 
The aim is to understand the frequency of 75 in 311845.

Going ahead to step 1:
3 divided by 75 is 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 75

Moving on to step 2:
If we divide 31 by 75, we get 0 and a remainder of 31.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 31 to get 31.
Append the next digit (1) from the dividend to 31 and continue with: 311 / 75

Advancing to step 3:
If we divide 311 by 75, we get 4 and a remainder of 11.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtracting 300 from 311 leaves us with 11.
Bring next digit (8) of the dividend behind the 11 and repeat the process: 118 / 75

Moving on to step 4:
75 goes into 118 1 times with a remainder of 43.
Use 1 as the next digit of our solution. 
Result so far: 41.0
If we take 75 away from 118, we end up with 43.
Include the next digit (4) from the dividend after 43, then repeat: 434 / 75

Let's proceed to step 5:
75 can be fit into 434 5 times, resulting in a remainder of 59.
The next digit of our result is 5. 
Result so far: 415.0
The remainder is 59 after subtracting 375 from 434.
Include the next digit (5) from the dividend after 59, then repeat: 595 / 75

Step 6:
If we divide 595 by 75, we get 7 and a remainder of 70.
The next digit of our result is 7. 
Result so far: 4157.0
Subtracting 525 from 595 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 7:
75 goes into 700 9 times with a remainder of 25.
Put 9 as the next digit of the answer. 
Result so far: 4157.9
Subtract 675 from 700 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Let's proceed to step 8:
The number 75 fits into 250 3 times, leaving a remainder of 25.
Put 3 as the next digit of the answer. 
Result so far: 4157.93
The remainder is 25 after subtracting 225 from 250.
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 9:
250 divided by 75 is 3 with a remainder of 25.
The number 3 becomes the next digit in our result. 
Result so far: 4157.933
Subtracting 225 from 250 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

The final result is 4157.933 with a remainder of 0.0025.