We're dividing 53150243 by 809 
The aim is to understand the frequency of 809 in 53150243.

Advancing to step 1:
809 goes into 5 0 times with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Grab the next digit (3) from the dividend, add it to 5, then carry on: 53 / 809

Moving on to step 2:
809 goes into 53 0 times with a remainder of 53.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 53 after subtracting 0 from 53.
Take the next digit (1) from the dividend and append it to 53, then repeat: 531 / 809

On to step 3:
If we divide 531 by 809, we get 0 and a remainder of 531.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 531 to get 531.
Bring next digit (5) of the dividend behind the 531 and repeat the process: 5315 / 809

Let's proceed to step 4:
When dividing 5315 by 809, we get 6 with a remainder of 461.
The next digit of our result is 6. 
Result so far: 6.0
Subtract 4854 from 5315 to get 461.
Take the next digit (0) from the dividend and append it to 461, then repeat: 4610 / 809

Going ahead to step 5:
If we divide 4610 by 809, we get 5 and a remainder of 565.
The number 5 becomes the next digit in our result. 
Result so far: 65.0
The remainder is 565 after subtracting 4045 from 4610.
Append the next digit (2) from the dividend to 565 and continue with: 5652 / 809

On to step 6:
If we divide 5652 by 809, we get 6 and a remainder of 798.
The next digit of our result is 6. 
Result so far: 656.0
The remainder is 798 after subtracting 4854 from 5652.
Grab the next digit (4) from the dividend, add it to 798, then carry on: 7984 / 809

Moving on to step 7:
If we divide 7984 by 809, we get 9 and a remainder of 703.
Put 9 as the next digit of the answer. 
Result so far: 6569.0
If we take 7281 away from 7984, we end up with 703.
Grab the next digit (3) from the dividend, add it to 703, then carry on: 7033 / 809

Moving on to step 8:
7033 divided by 809 is 8 with a remainder of 561.
Record the quotient 8 as the next digit in the result. 
Result so far: 65698.0
Deduct 6472 from 7033 and we're left with 561.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5610, and continue the process.

Let's proceed to step 9:
When dividing 5610 by 809, we get 6 with a remainder of 756.
The number 6 becomes the next digit in our result. 
Result so far: 65698.6
If we subtract 4854 from 5610, we get 756.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7560, and continue the process.

On to step 10:
If we divide 7560 by 809, we get 9 and a remainder of 279.
Record the quotient 9 as the next digit in the result. 
Result so far: 65698.69
Subtracting 7281 from 7560 leaves us with 279.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2790, and continue the process.

Step 11:
2790 divided by 809 is 3 with a remainder of 363.
The next digit of our result is 3. 
Result so far: 65698.693
The remainder is 363 after subtracting 2427 from 2790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3630, and continue the process.

Step 12:
809 can be fit into 3630 4 times, resulting in a remainder of 394.
Put 4 as the next digit of the answer. 
Result so far: 65698.6934
Subtract 3236 from 3630 to get 394.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3940, and continue the process.

Advancing to step 13:
The number 809 fits into 3940 4 times, leaving a remainder of 704.
Use 4 as the next digit of our solution. 
Result so far: 65698.69344
If we subtract 3236 from 3940, we get 704.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7040, and continue the process.

The final result is 65698.69344 with a remainder of 0.000704.