Let's divide 1539539 by 728
The aim is to understand the frequency of 728 in 1539539.

Advancing to step 1:
1 divided by 728 is 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 728

Step 2:
15 divided by 728 is 0 with a remainder of 15.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 15 to get 15.
Bring next digit (3) of the dividend behind the 15 and repeat the process: 153 / 728

Step 3:
728 goes into 153 0 times with a remainder of 153.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 153 leaves us with 153.
Append the next digit (9) from the dividend to 153 and continue with: 1539 / 728

Moving on to step 4:
The number 728 fits into 1539 2 times, leaving a remainder of 83.
The next digit of our result is 2. 
Result so far: 2.0
The remainder is 83 after subtracting 1456 from 1539.
Include the next digit (5) from the dividend after 83, then repeat: 835 / 728

Going ahead to step 5:
728 can be fit into 835 1 times, resulting in a remainder of 107.
Record the quotient 1 as the next digit in the result. 
Result so far: 21.0
Subtracting 728 from 835 leaves us with 107.
Append the next digit (3) from the dividend to 107 and continue with: 1073 / 728

Let's proceed to step 6:
728 goes into 1073 1 times with a remainder of 345.
Put 1 as the next digit of the answer. 
Result so far: 211.0
The remainder is 345 after subtracting 728 from 1073.
Fetch the next digit (9) from the dividend, attach it to 345 and continue: 3459 / 728

Advancing to step 7:
The number 728 fits into 3459 4 times, leaving a remainder of 547.
The next digit of our result is 4. 
Result so far: 2114.0
Subtracting 2912 from 3459 leaves us with 547.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5470, and continue the process.

Going ahead to step 8:
If we divide 5470 by 728, we get 7 and a remainder of 374.
Write down 7 as next digit of the result. 
Result so far: 2114.7
If we subtract 5096 from 5470, we get 374.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3740, and continue the process.

Going ahead to step 9:
728 goes into 3740 5 times with a remainder of 100.
Put 5 as the next digit of the answer. 
Result so far: 2114.75
Subtracting 3640 from 3740 leaves us with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Moving on to step 10:
When dividing 1000 by 728, we get 1 with a remainder of 272.
Record the quotient 1 as the next digit in the result. 
Result so far: 2114.751
If we take 728 away from 1000, we end up with 272.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

Going ahead to step 11:
728 goes into 2720 3 times with a remainder of 536.
The next digit of our result is 3. 
Result so far: 2114.7513
Subtracting 2184 from 2720 leaves us with 536.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5360, and continue the process.

Step 12:
If we divide 5360 by 728, we get 7 and a remainder of 264.
Record the quotient 7 as the next digit in the result. 
Result so far: 2114.75137
Subtracting 5096 from 5360 leaves us with 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Moving on to step 13:
The number 728 fits into 2640 3 times, leaving a remainder of 456.
Put 3 as the next digit of the answer. 
Result so far: 2114.751373
If we subtract 2184 from 2640, we get 456.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4560, and continue the process.

Step 14:
728 can be fit into 4560 6 times, resulting in a remainder of 192.
Put 6 as the next digit of the answer. 
Result so far: 2114.7513736
If we take 4368 away from 4560, we end up with 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Let's proceed to step 15:
728 goes into 1920 2 times with a remainder of 464.
The number 2 becomes the next digit in our result. 
Result so far: 2114.75137362
The remainder is 464 after subtracting 1456 from 1920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

The final outcome is 2114.75137362, with a leftover of 4.64e-07.