81224728 ÷ 577 
The aim is to understand the frequency of 577 in 81224728.

Moving on to step 1:
577 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 577

Moving on to step 2:
If we divide 81 by 577, we get 0 and a remainder of 81.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 81 to get 81.
Fetch the next digit (2) from the dividend, attach it to 81 and continue: 812 / 577

Step 3:
The number 577 fits into 812 1 times, leaving a remainder of 235.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 577 from 812 leaves us with 235.
Append the next digit (2) from the dividend to 235 and continue with: 2352 / 577

Moving on to step 4:
The number 577 fits into 2352 4 times, leaving a remainder of 44.
Put 4 as the next digit of the answer. 
Result so far: 14.0
If we subtract 2308 from 2352, we get 44.
Append the next digit (4) from the dividend to 44 and continue with: 444 / 577

Let's proceed to step 5:
577 goes into 444 0 times with a remainder of 444.
Put 0 as the next digit of the answer. 
Result so far: 140.0
If we subtract 0 from 444, we get 444.
Fetch the next digit (7) from the dividend, attach it to 444 and continue: 4447 / 577

Advancing to step 6:
4447 divided by 577 is 7 with a remainder of 408.
Write down 7 as next digit of the result. 
Result so far: 1407.0
If we take 4039 away from 4447, we end up with 408.
Grab the next digit (2) from the dividend, add it to 408, then carry on: 4082 / 577

Going ahead to step 7:
If we divide 4082 by 577, we get 7 and a remainder of 43.
Put 7 as the next digit of the answer. 
Result so far: 14077.0
If we subtract 4039 from 4082, we get 43.
Fetch the next digit (8) from the dividend, attach it to 43 and continue: 438 / 577

Going ahead to step 8:
When dividing 438 by 577, we get 0 with a remainder of 438.
Put 0 as the next digit of the answer. 
Result so far: 140770.0
Subtract 0 from 438 to get 438.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4380, and continue the process.

Going ahead to step 9:
4380 divided by 577 is 7 with a remainder of 341.
The next digit of our result is 7. 
Result so far: 140770.7
Subtracting 4039 from 4380 leaves us with 341.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3410, and continue the process.

Step 10:
577 can be fit into 3410 5 times, resulting in a remainder of 525.
Write down 5 as next digit of the result. 
Result so far: 140770.75
The remainder is 525 after subtracting 2885 from 3410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5250, and continue the process.

Moving on to step 11:
When dividing 5250 by 577, we get 9 with a remainder of 57.
Put 9 as the next digit of the answer. 
Result so far: 140770.759
If we subtract 5193 from 5250, we get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Let's proceed to step 12:
The number 577 fits into 570 0 times, leaving a remainder of 570.
The next digit of our result is 0. 
Result so far: 140770.759
Deduct 0 from 570 and we're left with 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5700, and continue the process.

On to step 13:
577 can be fit into 5700 9 times, resulting in a remainder of 507.
Put 9 as the next digit of the answer. 
Result so far: 140770.75909
Subtracting 5193 from 5700 leaves us with 507.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5070, and continue the process.

Advancing to step 14:
577 goes into 5070 8 times with a remainder of 454.
Record the quotient 8 as the next digit in the result. 
Result so far: 140770.759098
Subtract 4616 from 5070 to get 454.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4540, and continue the process.

Moving on to step 15:
4540 divided by 577 is 7 with a remainder of 501.
Write down 7 as next digit of the result. 
Result so far: 140770.7590987
Subtract 4039 from 4540 to get 501.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5010, and continue the process.

Moving on to step 16:
577 goes into 5010 8 times with a remainder of 394.
Write down 8 as next digit of the result. 
Result so far: 140770.75909878
If we subtract 4616 from 5010, we 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.

The final outcome is 140770.75909878, with a leftover of 3.94e-07.