We look at the division of 172373 by 75 
The aim is to understand the frequency of 75 in 172373.

Advancing to step 1:
1 divided by 75 is 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 75

Advancing to step 2:
When dividing 17 by 75, we get 0 with a remainder of 17.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 17 leaves us with 17.
Fetch the next digit (2) from the dividend, attach it to 17 and continue: 172 / 75

Going ahead to step 3:
75 can be fit into 172 2 times, resulting in a remainder of 22.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 150 from 172 and we're left with 22.
Append the next digit (3) from the dividend to 22 and continue with: 223 / 75

Step 4:
The number 75 fits into 223 2 times, leaving a remainder of 73.
Record the quotient 2 as the next digit in the result. 
Result so far: 22.0
If we subtract 150 from 223, we get 73.
Include the next digit (7) from the dividend after 73, then repeat: 737 / 75

Let's proceed to step 5:
75 can be fit into 737 9 times, resulting in a remainder of 62.
Put 9 as the next digit of the answer. 
Result so far: 229.0
Deduct 675 from 737 and we're left with 62.
Bring next digit (3) of the dividend behind the 62 and repeat the process: 623 / 75

On to step 6:
If we divide 623 by 75, we get 8 and a remainder of 23.
Record the quotient 8 as the next digit in the result. 
Result so far: 2298.0
Subtract 600 from 623 to get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Let's proceed to step 7:
If we divide 230 by 75, we get 3 and a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 2298.3
If we subtract 225 from 230, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 8:
If we divide 50 by 75, we get 0 and a remainder of 50.
The number 0 becomes the next digit in our result. 
Result so far: 2298.3
Subtracting 0 from 50 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 9:
75 can be fit into 500 6 times, resulting in a remainder of 50.
Record the quotient 6 as the next digit in the result. 
Result so far: 2298.306
The remainder is 50 after subtracting 450 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 10:
500 divided by 75 is 6 with a remainder of 50.
The next digit of our result is 6. 
Result so far: 2298.3066
If we subtract 450 from 500, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The final result is 2298.3066 with a remainder of 0.0005.