We look at the division of 509730 by 65 
The aim is to understand the frequency of 65 in 509730.

Step 1:
If we divide 5 by 65, we get 0 and a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Grab the next digit (0) from the dividend, add it to 5, then carry on: 50 / 65

Advancing to step 2:
50 divided by 65 is 0 with a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 50, we end up with 50.
Append the next digit (9) from the dividend to 50 and continue with: 509 / 65

Going ahead to step 3:
The number 65 fits into 509 7 times, leaving a remainder of 54.
The next digit of our result is 7. 
Result so far: 7.0
Subtracting 455 from 509 leaves us with 54.
Append the next digit (7) from the dividend to 54 and continue with: 547 / 65

On to step 4:
When dividing 547 by 65, we get 8 with a remainder of 27.
Record the quotient 8 as the next digit in the result. 
Result so far: 78.0
If we take 520 away from 547, we end up with 27.
Bring next digit (3) of the dividend behind the 27 and repeat the process: 273 / 65

Let's proceed to step 5:
The number 65 fits into 273 4 times, leaving a remainder of 13.
Use 4 as the next digit of our solution. 
Result so far: 784.0
The remainder is 13 after subtracting 260 from 273.
Fetch the next digit (0) from the dividend, attach it to 13 and continue: 130 / 65

Going ahead to step 6:
130 divided by 65 is 2 with a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 7842.0
The remainder is 0 after subtracting 130 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 7:
0 divided by 65 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 7842.0
The remainder is 0 after subtracting 0 from 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:
When dividing 0 by 65, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 7842.0
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.

Our division results in 7842.0 with a remaining 0.0.