Let's divide 85297708 by 509
The aim is to understand the frequency of 509 in 85297708.

Moving on to step 1:
If we divide 8 by 509, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Take the next digit (5) from the dividend and append it to 8, then repeat: 85 / 509

Moving on to step 2:
The number 509 fits into 85 0 times, leaving a remainder of 85.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 85, we get 85.
Bring next digit (2) of the dividend behind the 85 and repeat the process: 852 / 509

Going ahead to step 3:
509 goes into 852 1 times with a remainder of 343.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 343 after subtracting 509 from 852.
Take the next digit (9) from the dividend and append it to 343, then repeat: 3439 / 509

Advancing to step 4:
The number 509 fits into 3439 6 times, leaving a remainder of 385.
Write down 6 as next digit of the result. 
Result so far: 16.0
If we subtract 3054 from 3439, we get 385.
Grab the next digit (7) from the dividend, add it to 385, then carry on: 3857 / 509

On to step 5:
If we divide 3857 by 509, we get 7 and a remainder of 294.
Write down 7 as next digit of the result. 
Result so far: 167.0
If we subtract 3563 from 3857, we get 294.
Take the next digit (7) from the dividend and append it to 294, then repeat: 2947 / 509

Going ahead to step 6:
2947 divided by 509 is 5 with a remainder of 402.
Use 5 as the next digit of our solution. 
Result so far: 1675.0
Subtracting 2545 from 2947 leaves us with 402.
Take the next digit (0) from the dividend and append it to 402, then repeat: 4020 / 509

Advancing to step 7:
If we divide 4020 by 509, we get 7 and a remainder of 457.
The number 7 becomes the next digit in our result. 
Result so far: 16757.0
If we take 3563 away from 4020, we end up with 457.
Fetch the next digit (8) from the dividend, attach it to 457 and continue: 4578 / 509

Let's proceed to step 8:
If we divide 4578 by 509, we get 8 and a remainder of 506.
Use 8 as the next digit of our solution. 
Result so far: 167578.0
The remainder is 506 after subtracting 4072 from 4578.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5060, and continue the process.

Moving on to step 9:
If we divide 5060 by 509, we get 9 and a remainder of 479.
Put 9 as the next digit of the answer. 
Result so far: 167578.9
The remainder is 479 after subtracting 4581 from 5060.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4790, and continue the process.

Advancing to step 10:
509 can be fit into 4790 9 times, resulting in a remainder of 209.
Put 9 as the next digit of the answer. 
Result so far: 167578.99
Subtract 4581 from 4790 to get 209.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2090, and continue the process.

The quotient of the division is 167578.99, and the remainder is 0.209.