687478 ÷ 75 
The aim is to understand the frequency of 75 in 687478.

Moving on to step 1:
The number 75 fits into 6 0 times, leaving a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 75

Step 2:
75 goes into 68 0 times with a remainder of 68.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 68 leaves us with 68.
Bring next digit (7) of the dividend behind the 68 and repeat the process: 687 / 75

Moving on to step 3:
When dividing 687 by 75, we get 9 with a remainder of 12.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
Subtract 675 from 687 to get 12.
Append the next digit (4) from the dividend to 12 and continue with: 124 / 75

Let's proceed to step 4:
If we divide 124 by 75, we get 1 and a remainder of 49.
Put 1 as the next digit of the answer. 
Result so far: 91.0
If we subtract 75 from 124, we get 49.
Fetch the next digit (7) from the dividend, attach it to 49 and continue: 497 / 75

Let's proceed to step 5:
75 goes into 497 6 times with a remainder of 47.
Record the quotient 6 as the next digit in the result. 
Result so far: 916.0
The remainder is 47 after subtracting 450 from 497.
Include the next digit (8) from the dividend after 47, then repeat: 478 / 75

Let's proceed to step 6:
75 goes into 478 6 times with a remainder of 28.
Use 6 as the next digit of our solution. 
Result so far: 9166.0
Deduct 450 from 478 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 7:
The number 75 fits into 280 3 times, leaving a remainder of 55.
Write down 3 as next digit of the result. 
Result so far: 9166.3
The remainder is 55 after subtracting 225 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Advancing to step 8:
75 can be fit into 550 7 times, resulting in a remainder of 25.
Put 7 as the next digit of the answer. 
Result so far: 9166.37
Deduct 525 from 550 and we're left 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.

Advancing to step 9:
The number 75 fits into 250 3 times, leaving a remainder of 25.
Write down 3 as next digit of the result. 
Result so far: 9166.373
Deduct 225 from 250 and we're left 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.

Moving on to step 10:
When dividing 250 by 75, we get 3 with a remainder of 25.
Write down 3 as next digit of the result. 
Result so far: 9166.3733
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.

The quotient of the division is 9166.3733, and the remainder is 0.00025.