We look at the division of 457505 by 508 
The aim is to understand the frequency of 508 in 457505.

On to step 1:
When dividing 4 by 508, we get 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 508

Advancing to step 2:
45 divided by 508 is 0 with a remainder of 45.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 45 leaves us with 45.
Include the next digit (7) from the dividend after 45, then repeat: 457 / 508

On to step 3:
508 goes into 457 0 times with a remainder of 457.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 457, we end up with 457.
Bring next digit (5) of the dividend behind the 457 and repeat the process: 4575 / 508

Advancing to step 4:
508 goes into 4575 9 times with a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Deduct 4572 from 4575 and we're left with 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 508

Moving on to step 5:
If we divide 30 by 508, we get 0 and a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 90.0
Subtracting 0 from 30 leaves us with 30.
Append the next digit (5) from the dividend to 30 and continue with: 305 / 508

On to step 6:
305 divided by 508 is 0 with a remainder of 305.
Record the quotient 0 as the next digit in the result. 
Result so far: 900.0
If we take 0 away from 305, we end up with 305.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

Advancing to step 7:
508 goes into 3050 6 times with a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 900.6
If we take 3048 away from 3050, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 8:
508 goes into 20 0 times with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 900.6
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 9:
The number 508 fits into 200 0 times, leaving a remainder of 200.
Put 0 as the next digit of the answer. 
Result so far: 900.6
The remainder is 200 after subtracting 0 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

The final outcome is 900.6, with a leftover of 0.02.