557490 ÷ 75 
The aim is to understand the frequency of 75 in 557490.

Let's proceed to step 1:
5 divided by 75 is 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Grab the next digit (5) from the dividend, add it to 5, then carry on: 55 / 75

Going ahead to step 2:
75 can be fit into 55 0 times, resulting in a remainder of 55.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 55 after subtracting 0 from 55.
Grab the next digit (7) from the dividend, add it to 55, then carry on: 557 / 75

Moving on to step 3:
557 divided by 75 is 7 with a remainder of 32.
Put 7 as the next digit of the answer. 
Result so far: 7.0
If we take 525 away from 557, we end up with 32.
Include the next digit (4) from the dividend after 32, then repeat: 324 / 75

Step 4:
75 can be fit into 324 4 times, resulting in a remainder of 24.
The next digit of our result is 4. 
Result so far: 74.0
The remainder is 24 after subtracting 300 from 324.
Bring next digit (9) of the dividend behind the 24 and repeat the process: 249 / 75

Moving on to step 5:
75 can be fit into 249 3 times, resulting in a remainder of 24.
Write down 3 as next digit of the result. 
Result so far: 743.0
Deduct 225 from 249 and we're left with 24.
Append the next digit (0) from the dividend to 24 and continue with: 240 / 75

Let's proceed to step 6:
75 goes into 240 3 times with a remainder of 15.
Record the quotient 3 as the next digit in the result. 
Result so far: 7433.0
Deduct 225 from 240 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 7:
75 can be fit into 150 2 times, resulting in a remainder of 0.
The next digit of our result is 2. 
Result so far: 7433.2
The remainder is 0 after subtracting 150 from 150.
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:
75 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 7433.2
If we take 0 away from 0, we end up 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.

On to step 9:
0 divided by 75 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 7433.2
If we subtract 0 from 0, we 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.

The final result is 7433.2 with a remainder of 0.0.