510585 ÷ 75 
The aim is to understand the frequency of 75 in 510585.

Going ahead to step 1:
75 goes into 5 0 times with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 75

Step 2:
The number 75 fits into 51 0 times, leaving a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Append the next digit (0) from the dividend to 51 and continue with: 510 / 75

On to step 3:
If we divide 510 by 75, we get 6 and a remainder of 60.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
Subtract 450 from 510 to get 60.
Fetch the next digit (5) from the dividend, attach it to 60 and continue: 605 / 75

Step 4:
75 can be fit into 605 8 times, resulting in a remainder of 5.
The number 8 becomes the next digit in our result. 
Result so far: 68.0
If we subtract 600 from 605, we get 5.
Take the next digit (8) from the dividend and append it to 5, then repeat: 58 / 75

Going ahead to step 5:
75 goes into 58 0 times with a remainder of 58.
Use 0 as the next digit of our solution. 
Result so far: 680.0
Subtract 0 from 58 to get 58.
Bring next digit (5) of the dividend behind the 58 and repeat the process: 585 / 75

Step 6:
585 divided by 75 is 7 with a remainder of 60.
The next digit of our result is 7. 
Result so far: 6807.0
Subtract 525 from 585 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 7:
The number 75 fits into 600 8 times, leaving a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 6807.8
Subtract 600 from 600 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
If we divide 0 by 75, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 6807.8
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
If we divide 0 by 75, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 6807.8
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 6807.8 with a remainder of 0.0.