513572 ÷ 28 
The aim is to understand the frequency of 28 in 513572.

Step 1:
The number 28 fits into 5 0 times, leaving a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 28

Let's proceed to step 2:
28 can be fit into 51 1 times, resulting in a remainder of 23.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 23 after subtracting 28 from 51.
Append the next digit (3) from the dividend to 23 and continue with: 233 / 28

Step 3:
The number 28 fits into 233 8 times, leaving a remainder of 9.
Record the quotient 8 as the next digit in the result. 
Result so far: 18.0
The remainder is 9 after subtracting 224 from 233.
Grab the next digit (5) from the dividend, add it to 9, then carry on: 95 / 28

Let's proceed to step 4:
If we divide 95 by 28, we get 3 and a remainder of 11.
Record the quotient 3 as the next digit in the result. 
Result so far: 183.0
The remainder is 11 after subtracting 84 from 95.
Grab the next digit (7) from the dividend, add it to 11, then carry on: 117 / 28

Step 5:
If we divide 117 by 28, we get 4 and a remainder of 5.
Use 4 as the next digit of our solution. 
Result so far: 1834.0
Subtracting 112 from 117 leaves us with 5.
Take the next digit (2) from the dividend and append it to 5, then repeat: 52 / 28

Let's proceed to step 6:
If we divide 52 by 28, we get 1 and a remainder of 24.
Put 1 as the next digit of the answer. 
Result so far: 18341.0
If we subtract 28 from 52, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 7:
28 goes into 240 8 times with a remainder of 16.
Put 8 as the next digit of the answer. 
Result so far: 18341.8
If we subtract 224 from 240, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 8:
28 goes into 160 5 times with a remainder of 20.
The next digit of our result is 5. 
Result so far: 18341.85
Deduct 140 from 160 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 9:
28 can be fit into 200 7 times, resulting in a remainder of 4.
Write down 7 as next digit of the result. 
Result so far: 18341.857
Subtracting 196 from 200 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 10:
When dividing 40 by 28, we get 1 with a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 18341.8571
If we take 28 away from 40, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 11:
When dividing 120 by 28, we get 4 with a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 18341.85714
Subtracting 112 from 120 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 12:
28 can be fit into 80 2 times, resulting in a remainder of 24.
The number 2 becomes the next digit in our result. 
Result so far: 18341.857142
If we subtract 56 from 80, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 13:
240 divided by 28 is 8 with a remainder of 16.
Use 8 as the next digit of our solution. 
Result so far: 18341.8571428
Subtracting 224 from 240 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 14:
28 goes into 160 5 times with a remainder of 20.
The number 5 becomes the next digit in our result. 
Result so far: 18341.85714285
Subtracting 140 from 160 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Our division results in 18341.85714285 with a remaining 2e-08.