We look at the division of 81285624 by 578 
The aim is to understand the frequency of 578 in 81285624.

Let's proceed to step 1:
578 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 578

Going ahead to step 2:
578 goes into 81 0 times with a remainder of 81.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 81, we end up with 81.
Take the next digit (2) from the dividend and append it to 81, then repeat: 812 / 578

Moving on to step 3:
When dividing 812 by 578, we get 1 with a remainder of 234.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 578 from 812 and we're left with 234.
Bring next digit (8) of the dividend behind the 234 and repeat the process: 2348 / 578

Let's proceed to step 4:
578 goes into 2348 4 times with a remainder of 36.
Use 4 as the next digit of our solution. 
Result so far: 14.0
If we take 2312 away from 2348, we end up with 36.
Include the next digit (5) from the dividend after 36, then repeat: 365 / 578

Advancing to step 5:
If we divide 365 by 578, we get 0 and a remainder of 365.
The number 0 becomes the next digit in our result. 
Result so far: 140.0
Deduct 0 from 365 and we're left with 365.
Grab the next digit (6) from the dividend, add it to 365, then carry on: 3656 / 578

Step 6:
The number 578 fits into 3656 6 times, leaving a remainder of 188.
Put 6 as the next digit of the answer. 
Result so far: 1406.0
Subtract 3468 from 3656 to get 188.
Append the next digit (2) from the dividend to 188 and continue with: 1882 / 578

Step 7:
1882 divided by 578 is 3 with a remainder of 148.
The next digit of our result is 3. 
Result so far: 14063.0
Deduct 1734 from 1882 and we're left with 148.
Grab the next digit (4) from the dividend, add it to 148, then carry on: 1484 / 578

Advancing to step 8:
The number 578 fits into 1484 2 times, leaving a remainder of 328.
Write down 2 as next digit of the result. 
Result so far: 140632.0
Subtract 1156 from 1484 to get 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

Let's proceed to step 9:
If we divide 3280 by 578, we get 5 and a remainder of 390.
Put 5 as the next digit of the answer. 
Result so far: 140632.5
Subtracting 2890 from 3280 leaves us with 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Advancing to step 10:
3900 divided by 578 is 6 with a remainder of 432.
The number 6 becomes the next digit in our result. 
Result so far: 140632.56
If we take 3468 away from 3900, we end up with 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

Moving on to step 11:
4320 divided by 578 is 7 with a remainder of 274.
Write down 7 as next digit of the result. 
Result so far: 140632.567
The remainder is 274 after subtracting 4046 from 4320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2740, and continue the process.

Going ahead to step 12:
578 goes into 2740 4 times with a remainder of 428.
Use 4 as the next digit of our solution. 
Result so far: 140632.5674
The remainder is 428 after subtracting 2312 from 2740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4280, and continue the process.

Moving on to step 13:
578 goes into 4280 7 times with a remainder of 234.
Put 7 as the next digit of the answer. 
Result so far: 140632.56747
Deduct 4046 from 4280 and we're left with 234.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

Let's proceed to step 14:
578 goes into 2340 4 times with a remainder of 28.
Write down 4 as next digit of the result. 
Result so far: 140632.567474
If we take 2312 away from 2340, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 15:
280 divided by 578 is 0 with a remainder of 280.
Use 0 as the next digit of our solution. 
Result so far: 140632.567474
Subtracting 0 from 280 leaves us with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Advancing to step 16:
578 can be fit into 2800 4 times, resulting in a remainder of 488.
Record the quotient 4 as the next digit in the result. 
Result so far: 140632.56747404
Deduct 2312 from 2800 and we're left with 488.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4880, and continue the process.

Our division results in 140632.56747404 with a remaining 4.88e-07.