We look at the division of 678410 by 75 
The aim is to understand the frequency of 75 in 678410.

Moving on to step 1:
If we divide 6 by 75, we get 0 and a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Bring next digit (7) of the dividend behind the 6 and repeat the process: 67 / 75

Going ahead to step 2:
75 can be fit into 67 0 times, resulting in a remainder of 67.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 67 and we're left with 67.
Fetch the next digit (8) from the dividend, attach it to 67 and continue: 678 / 75

On to step 3:
When dividing 678 by 75, we get 9 with a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 9.0
If we take 675 away from 678, we end up with 3.
Include the next digit (4) from the dividend after 3, then repeat: 34 / 75

Advancing to step 4:
34 divided by 75 is 0 with a remainder of 34.
The number 0 becomes the next digit in our result. 
Result so far: 90.0
Subtracting 0 from 34 leaves us with 34.
Bring next digit (1) of the dividend behind the 34 and repeat the process: 341 / 75

Moving on to step 5:
When dividing 341 by 75, we get 4 with a remainder of 41.
The next digit of our result is 4. 
Result so far: 904.0
If we subtract 300 from 341, we get 41.
Take the next digit (0) from the dividend and append it to 41, then repeat: 410 / 75

Let's proceed to step 6:
75 goes into 410 5 times with a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 9045.0
If we subtract 375 from 410, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 7:
75 goes into 350 4 times with a remainder of 50.
Use 4 as the next digit of our solution. 
Result so far: 9045.4
If we subtract 300 from 350, 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.

On to step 8:
500 divided by 75 is 6 with a remainder of 50.
Put 6 as the next digit of the answer. 
Result so far: 9045.46
Subtracting 450 from 500 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.

Advancing to step 9:
The number 75 fits into 500 6 times, leaving a remainder of 50.
Record the quotient 6 as the next digit in the result. 
Result so far: 9045.466
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 outcome is 9045.466, with a leftover of 0.005.