We're dividing 80509143 by 576 
The aim is to understand the frequency of 576 in 80509143.

Advancing to step 1:
8 divided by 576 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 576

Let's proceed to step 2:
576 can be fit into 80 0 times, resulting in a remainder of 80.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 80 leaves us with 80.
Append the next digit (5) from the dividend to 80 and continue with: 805 / 576

Moving on to step 3:
The number 576 fits into 805 1 times, leaving a remainder of 229.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 576 from 805, we get 229.
Fetch the next digit (0) from the dividend, attach it to 229 and continue: 2290 / 576

Moving on to step 4:
If we divide 2290 by 576, we get 3 and a remainder of 562.
The next digit of our result is 3. 
Result so far: 13.0
Deduct 1728 from 2290 and we're left with 562.
Append the next digit (9) from the dividend to 562 and continue with: 5629 / 576

Let's proceed to step 5:
5629 divided by 576 is 9 with a remainder of 445.
Use 9 as the next digit of our solution. 
Result so far: 139.0
Deduct 5184 from 5629 and we're left with 445.
Grab the next digit (1) from the dividend, add it to 445, then carry on: 4451 / 576

Going ahead to step 6:
When dividing 4451 by 576, we get 7 with a remainder of 419.
Put 7 as the next digit of the answer. 
Result so far: 1397.0
Subtract 4032 from 4451 to get 419.
Bring next digit (4) of the dividend behind the 419 and repeat the process: 4194 / 576

Step 7:
When dividing 4194 by 576, we get 7 with a remainder of 162.
Use 7 as the next digit of our solution. 
Result so far: 13977.0
Subtracting 4032 from 4194 leaves us with 162.
Grab the next digit (3) from the dividend, add it to 162, then carry on: 1623 / 576

Advancing to step 8:
576 can be fit into 1623 2 times, resulting in a remainder of 471.
Use 2 as the next digit of our solution. 
Result so far: 139772.0
Subtract 1152 from 1623 to get 471.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4710, and continue the process.

Step 9:
576 goes into 4710 8 times with a remainder of 102.
The number 8 becomes the next digit in our result. 
Result so far: 139772.8
Subtracting 4608 from 4710 leaves us with 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Let's proceed to step 10:
576 can be fit into 1020 1 times, resulting in a remainder of 444.
The number 1 becomes the next digit in our result. 
Result so far: 139772.81
If we subtract 576 from 1020, we get 444.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4440, and continue the process.

Going ahead to step 11:
576 can be fit into 4440 7 times, resulting in a remainder of 408.
Use 7 as the next digit of our solution. 
Result so far: 139772.817
Subtract 4032 from 4440 to get 408.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

On to step 12:
4080 divided by 576 is 7 with a remainder of 48.
Record the quotient 7 as the next digit in the result. 
Result so far: 139772.8177
The remainder is 48 after subtracting 4032 from 4080.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

After the division, we end up with 139772.8177 and a remainder of 0.00048.